The correct answer is 0.292 M.
Molarity or molar concentration is the number of moles of solute per liter of solution or molarity can be defined to be as number of moles of solute in volume of solution.
Mass of Gold(III) hydroxide = 1.1868 g
Moles of gold(III) hydroxide = mass of Au(OH)₃ / Molar mass of Au(OH)₃
Moles of Gold(III) = 1.1868/247.98 = 0. 004 moles
Moles of hydroxide ion from Au(OH)₃ will be,
Au(OH)₃ ⇔ Au³⁺ + OH⁻
Here,
if 1 mole of Au(OH)₃ gives 3 moles of OH⁻ ion then,
0.006 moles of Au(OH)₃ will give,
= 3 x 0.006 moles of OH⁻ ions
= 0.018 moles of OH⁻ ions
Again,
NaOH ⇔Na⁺ + OH⁻
Since, [OH⁻] = [NaOH] = 1.76 x 10⁻¹ = 0.176 M = molarity.
Hence, the moles of OH⁻ = Molarity of OH⁻ x VH of OH⁻
= 0.176 M x 0.154L
= 0.0271 moles
Now, total moles of OH⁻ will be
= OH⁻ from Au(OH)₃ + OH⁻ from NaOH
= (0.018 + 0.0271) moles
= 0.0451 moles of OH⁻
To find the concentration of hydroxide ion, we need to just apply the formula of molarity:
[OH⁻] = moles of OH⁻ / Volume of the solution
= 0.0451 / 0.154
= 0.292 M
Therefore, the the total concentration of hydroxide ion, in molarity is 0.292 M.
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an rna primer is created by enzyme which then supplies the (3 or 5)' hydroxyl group used by to start adding dna nucleotides.
An enzyme called primase,3 which produces a rna primer, provides that (3 or 5)' hydroxy group needed to begin adding DNA nucleotides.
What use do hydroxyls serve?A functional group named a hydroxyl binds to some compounds that have a hydrogen and oxygen atom bound together. This functional group, which is also written hydroxy, plays crucial roles in the actions of both alcohols and organic acids.
Is OH an alcohol or a hydroxyl?A substance classified as an alcohol has an aliphatic side atom attached to a hydroxyl (OH) substituent. Since OH serves as all alcohols' functional group, we frequently refer to alcohols by their generic formula Rh, whereby R is an alkyl. In nature, alcohols are widespread.
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What are the categories of Scope 3 emissions?.
The categories of Scope 3 emissions include capital goods, upstream transport and distribution, purchased products and services, fuel combustion and energy consumption, and employee commuting.
Scope 3 emissions can be divided into 15 categories, albeit not all of them will apply to all enterprises. Fuel combustion and downstream of the organization's operations are both considered to be sources of scope 3 emissions. The Greenhouse Gas Protocol specifies three emissions streams, one of which is called Scope 3 emissions. (GHGP). Emissions that are directly attributable to operations that a reporting organization owns or manages are covered by scope 1. Scope 2 emissions are those connected to the production of energy that has been purchased, such electricity. The activities from assets that the reporting organization does not own or control, but that it does use, result in scope 3 fuel combustion.
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How is magnesium hydroxide used?.
The magnesium hydroxide used to treat occasional constipation in children and adults on a short-term basis.
Magnesium hydroxide can be used as a temporary remedy for children and adults who occasionally have constipation. Magnesium hydroxide is a component of a class of medications known as saline laxatives. It stimulates the retention of water. If this medication is used excessively or continuously, it may cause constipation to persist and cause a dependence on laxatives. Excessive use can also lead to dehydration, ongoing diarrhea, and mineral imbalances. Inform your physician if your symptoms persist or worsen. The over-the-counter drug "Milk of Magnesia," which contains magnesium hydroxide, is used to treat heartburn, occasional constipation, and upset stomach. It shouldn't be used continuously. There are chewable and liquid dosage variants of this drug. stress reduction and mood regulation.
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8. four charges are at the corners of a square, with b and c on opposite corners. charges a and d, on the other two corners, have equal charge, while both b and c have a charge of 1.0 c. assume that the charge on a is such that the force on b is zero. note fbc the magnitude of the coulomb force between charges b and c. note fad the magnitude of the coulomb force between charges a and d. what is the ratio fbc/fad
Four charges form a rectangle having B and C on the corners that are opposite each other. Charge on A must be -0.35C in order for force B to be zero.
What in chemistry is a charge?
An electromagnetic field exerts a force on matter as a result of the physical attribute of charge. Positive or negative charges can exist in an electric field. The matter is regarded as neutral or uncharged if there is no net electric current present.
An electron charge is what?
The electron is the lightest known stable subatomic particle. It has a negative charge that is equivalent to 1.602176634 coulombs, which is regarded as the fundamental building block of electric charge.
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determine the molarity of a nano3 aqueous solution that is 17.0% by mass given that its density is 1.153 g/cm3.
The molarity of the aqueous solution of NaNO3 is 2.30 M .
What is molarity of NaNO3?
Therefore, to calculate how many grams you obtain in that particular volume, utilize the solution's density.
1.00L x 1000mL/1L x 1.153g/1mL
= 1153g
Here, indicates this solution has a 17.0% NaNO3 content by mass. This indicates that for every 100.0 g of solution, you receive 17.0 g of NaNO3.
1153g solution x 17.0g NaNO3/100g solution
= 196.01 g NaNO3
Use the molar mass of NaNO3 to calculate how many moles are contained in that many grams.
196.01 x 1 mole NaNO3/84.9947 g/mol
= 2.30 moles of NaNO3
To find molarity the formula is ,
c = n/v
= 2.30 moles / 1.00L
= 2.30 M
The molarity of NaNO3 is 2.30M.
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Write the net ionic equation for the following molecular equation. 3CuCl2 (aq) + 2Na3PO4(aq) + Cu3(PO4)2 (s) + 6NaCl(aq) (Use the lowest possible coefficients. Be sure to to specify states such as (aq) or (s). If a box is not needed, leave it blank.) + + The following molecular equation represents the reaction that occurs when aqueous solutions of silver(I) nitrate and iron(III) chloride are combined. 3AgNO3(aq) + FeCl3 (aq) + 3AgCl(s) + Fe(NO3)3 (aq) Write the balanced net ionic equation for the reaction. (Use the lowest possible coefficients. Be sure to to specify states such as (aq) or (s). If a box is not needed, leave it blank.) + + Write the net ionic equation for the following molecular equation. HBr is a strong electrolyte. HCIO is a weak electrolyte. KCIO(aq) + HBr(aq) → KBr(aq) + HCIO(aq) (Use the lowest possible coefficients. Be sure to to specify states such as (aq) or (s). If a box is not needed, leave it blank.)
The net ionic equation for the following molecular equation. 3Cu2+ (aq) + 2PO4-three (aq) ==> Cu(PO4)2 (s) 2. 3Ag+ (aq) + 3Cl- (aq) ==> three AgCl 3.
Step 1: Write the overall ionic equation wherein compounds in aqueous kingdom are ionized into their ionic components. The insoluble stable isn't ionized because it isn't in an aqueous kingdom.
Step 2: The spectator ions that seem on each aspects of the equation are cancelled out to offer the net ionic equation.
In essentially 3 ways: components equation, complete ionic equation, and net ionic equation. For a precipitation reaction, the net ionic equation indicates simplest the ones species that extrade from the reactant facet to the product facet. Those that don't extrade are referred to as spectator ions or species and are not noted from the net ionic equation.
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the wittin reaction is a superior alternative to e2 reactions for the creation of carbon-carbon pi bonds because the position of such bond in the product is unambiguous (T/F)
(T)rue
It is true that the witting response is a better option than the e2 reaction for producing carbon-carbon pi bonds since the position of the bond in the final product is clear.
What does the chemical term "bonding" mean?Chemical bonding is the process through which atoms, molecules, or protons form a chemical link to create a chemical compound. The atoms in the resultant molecule are held together by these chemical bonds.
With an example, define bond in chemistry?When electrons are shared amongst atoms, a chemical bond is said to be covalent. An illustration of a lone pair is the bond that occurs when h2 and o2 atoms combine to make water. A limited electrostatic bond known as a hydrogen bond involves hydrogen acting as a link between two atoms.
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how many units of color would a dihybrid (a1a2 b1b2) individual have? (enter your answer as a number.)
A dihybrid cross examines how two distinct genes are transmitted from a pair of organisms. It displays the various phenotypic configurations for those two traits that the parents might be able to pass on.
What Is a Dihybrid Cross?You have tracked the inheritance of a characteristic in a monohybrid cross using Punnett squares. But what if you wish to monitor the inheritance of two traits? A dihybrid crosses two genes while doing so.By dissecting the word "dihybrid," which is a fantastic method to remember this:Di = two hybrid = a combination
Mendel's pea plant experiment is the most well-known dihybrid experiment. He put the shape and color of the seeds to the test.In the beginning, Mendel bred a pea plant that yielded spherical, yellow peas with a plant that produced wrinkled, green peas. These parents produced spherical, yellow peas in all of their offspring plants. Mendel discovered that the qualities of yellow and round predominate over those of green and wrinkled.To learn more About dihybrid cross refer to:
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What are radicals give 3 examples?.
H2SO4 (sulfuric acid): H2SO4 contains the chemical radical SO24. HNO3 (nitric acid): HNO3 contains the chemical radical NO3.
What purpose does sulfuric acid serve?Sulfuric acid is a crucial commodity chemical utilized in modern manufacturing, especially for the synthesis of phosphoric acid. Metal makers use it extensively because it is effective at eliminating oxidation from steel and iron. Sulfuric acid is a particularly hazardous substance.
Why isn't sulfuric acid employed?KI would result in HI in the presence of a weak acid. The HI is depleted to create I2 gas if sulfuric acid is utilized as the acid. As a result, alcohol cannot react with acid to form alkyl iodide. Due to this, sulfuric acid is not utilized in this process.
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Does moles represent concentration?.
The amount of dissolved material per unit volume of solution, measured in moles per litre, is the most common way to express the concentration of a solution as its molar concentration.
For chemists, the number of moles of a chemical per unit volume is known as molarity, which also means concentration. The letter "M" stands for concentration units. It stands for either moles per cubic decimeters or moles per litre, denoted by the symbols mol/L or mol L-1. Concentration is the ratio of the amount of solute to the amount of solution, as you stated with "concentration as g/L of Kg/L." The amount of moles of a solute per liter of solution is measured by molarity, a unit of concentration. The concentration increases with the amount of solute present, increasing the molarity of the solution as a result. On the other hand, the concentration and molarity decrease as the amount of solvent increases.
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If a certain dose of radiation produce a skin burn, a higher dose of radiation will cause the skin burn to be more severe; however, a dose below the threshold level for skin burn will
a. demonstrate this effect to a much greater degree
b. demonstrate this effect to moderate degree
c. demonstrate this effect to a lesser degree
d. not demonstrate the effect
If a certain dose of radiation produce a skin burn, a higher dose of radiation will cause the skin burn to be more severe; however, a dose below the threshold level for skin burn will not demonstrate the effect.
The radiation is also known as the electromagnetic radiation. The energy that emittance from the source and travel thorough space at speed is called as radiations. A dose below the threshold level for the skin burn will not demonstrate the effect.
Thus, If a certain dose of radiation produce a skin burn, a higher dose of radiation will cause the skin burn to be more severe; however, a dose below the threshold level for skin burn will not demonstrate the effect.
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What is the correct order of events for cellular respiration?.
Thus, glycolysis, oxidative decarboxylation, Krebs cycle, electron transport chain, and oxidative phosphorylation are the processes of cellular respiration that should be performed in that order.
Which 5 processes include cellular respiration?The Krebs cycle, also called the citric acid cycle, transition reaction, pyruvate oxidation, and oxidative phosphorylation via the electron transport chain are the four steps of cellular respiration in eukaryotes.
A metabolic mechanism called cellular respiration breaks down glucose and generates ATP. The phases of cellular respiration include glycolysis, pyruvate oxidation, the Krebs cycle (or citric acid cycle), and oxidative phosphorylation.
In the cytoplasm of your cells, glycolysis—the first phase of cellular respiration—takes place. In this procedure, a glucose molecule is split into two pyruvate molecules (pyruvic acid).
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Does sodium and oxygen form an ionic compound?.
The fact that sodium will combine with oxygen to generate an ionic molecule indicates that this will happen.
How can you tell if a substance is ionic?As a general rule, ionic bonding can be seen in compounds where a metal bonds with a non-metal or a semi-metal. Molecular compounds are those that are made entirely of non-metallic elements or semi-metallic elements combined with non-metallic elements and exhibit covalent bonding.
What distinguishes ions from covalent bonds?When a metals reacts with a nonmetal, ionic compounds are typically created (or a polyatomic ion). When two nonmetals interact, covalent compounds are created. Due to the fact that gas is a nonmetal, binaries compounds hydrogen are typically covalent compounds as well.
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An ammonium nitrate product dissolves easily in water at room temperature, and the process causes the solution to become quite cold. Which of the following are true about the dissolution of ammonium nitrate?
I. The process is endothermic.
II. The solubility will be greater in warmer water.
III. So for the reaction is negative.
The dissolution of ammonium nitrate is an endothermic process and The solubility will be greater in warmer water.
Temperature is a bodily quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measured by using a thermometer. Thermometers are calibrated in diverse temperature scales that historically have trusted various reference points and thermometric materials for definition.
Temperature plays a vital role in hospital treatment (each people and animal), food, drinks, and agriculture. Our typical health is often reliant upon the temperature in many methods as properly. Preserving the right temperature degrees in medical cold garage areas is crucial.
The SI unit of temperature as in line with the international machine of units is Kelvin that's represented by the symbol K.
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write a conclusion for the experiment including the concentration of acetic acid in household vinegar as determined by the class as a whole.
Finding the molar concentration or acetic acid present in vinegar was the aim of this inquiry. According to this experiment, acetic acid has a concentration of 0.44 mol/L (around 3.87%).
What ingredients are in vinegar?Acetic acid but also water are combined to create vinegar through a two-step alcoholic fermentation. First, yeast consume any liquid derived from a plant source, also including fruits, whole carbohydrates, potatoes, or rice, and feast on the complex carbohydrates within. It ferments into alcohol.
What is the benefit of vinegar?Bacteria and other infections can be killed by vinegar. Vinegar has long been used to clean, disinfect, and cure ear infections, warts, lice, and nail fungus.
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which of the following solutions contains molecules that absorb the highest energy light? note that the colors listed are the colors that are observed for the solutions, not the colors that are absorbed.
The solutions that contains molecules that absorb the highest energy light is purple colour solution.
What determines the amount of light energy a color absorbs?The amount of light energy a colour absorbs determines the amount of heat energy that light can be converted into. For example, the color violet contains more energy than red. That means violet absorbs more light, making it a warmer color than red.
dark colors absorb more light energy, they absorb a lot more heat than brighter hues. In fact, the closer a hue gets to dark, the more heat it absorbs from light sources. Because black clothing reflects little solar light, it also reflects less solar heat, making it hotter. The same thing happens with any color as it approaches black - the darker the hue, the more heat it will absorb.
This is why dark clothes are better for winter and bright clothes are better for summer - when you wear dark colors, you're protecting yourself from the cold in winter and the hot of the sun in summer.
And this is why people who work outside often wear colored gloves - dark colors block out heat, while bright colors block out cold.
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a 20.0 ml solution of naoh is neutralized with 29.3 ml of 0.200 m hbr. what is the concentration of the original naoh solution?
The concentration of the original naoh solution is 0.325M NaOH.
What is solution?Solution is something where we mixed up two objects.
First, find the number of mols of HBr used for the neutralization by multiplying the concentration of HBr by the volume of HBr (in liters)...
0.200M * 0.0325L = 6.5E-3 mol HBr
since the reaction between HBr and NaOH is one-to-one, you know that there must have been 6.5E-3 mol NaOH in the basic 20.0mL solution, so to get concentration, and divide the moles of base by the volume of the base (in liters) and you get...
6.5E-3mol/0.0200L = 0.325M NaOH
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If you had a solution containing a mixture of magnesuun, strontium, and banum, how could you separate the three
elements (Hint Consider process of elimination)
If you had a solution containing a mixture of magnesium, strontium, and barium, then we could separate these three elements using hydrogen sulphide, chromic acid and sulphuric acid.
To separate three elements from the solution, first we need to remove the magnesium element by adding hydrogen sulphide(H₂S) in the solution. It forms magnesium sulphide(MgS) as a precipitate and remaining ions are used for further separation.
To separate the barium element, we need to add chromic acid in the solution, which precipitate the barium chromate(BaCrO₄) from the solution.
In the remaining solution of strontium, we need to add sulphuric acid, which precipitates out the strontium sulphate(SrSO₄) as a product.
Therefore, to separate magnesium, strontium, and barium, we need to use hydrogen sulphide, chromic acid and sulphuric acid.
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What do you expect to see in a test tube when several drops of two aqueous solutions are mixed, and an insoluble precipitate is formed?.
When we mix several drops of two aqueous solutions and an insoluble precipitate is formed then we may expect to see a cloudy appearance.
In performing chemical reactions when some quantity of two solutions are mixed together and formation of a solid form of residue takes place beneath the liquid, then such reactions are known as precipitation reactions. In double displacement reaction between two different solutions, the insoluble salts separates out to form precipitate. For example in the reaction between sodium hydroxide and copper sulphate, copper hydroxide gives a pale blue precipitate.
2NaOH(aq) + CuSO₄(aq) → Cu(OH)₂ (s) + Na₂SO₄ (aq)
pale blue ppt
Hence, these insoluble precipitates gives a cloudy appearance to the solution. They are mostly coloured or white.
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if the volumes in the buret and the flask are identical and the concentration of the acid in the buret is 0.500 m, what is the concentration of the base in the flask?
The concentration of the base in the flask when the volumes in the buret and the flask are identical and the concentration of the acid in the buret is 0.500 m is 1.0 M
Assume that stopping the titration when all of the bases in the flask have been neutralized by the H+ ions...
and I thought the equation was:
H+ + OH- <--> H2O
which is a 1:1 ratio (it takes one mole of H+ to neutralize every 1 mole of OH-)...this ratio means that M1V1 = M2V2 is true.
M1V1 = M2V2 simply means Molarity1 x Volume1 = Molarity2 x Volume2
so if your volumes are the same, then I'm just going to relabel: V1 = V2 = V
now you have:
M1V = M2V
the volume cancels out.
so M1 = M2
which means that the concentration of the base and the concentration of the acid should be the same...thus [OH-] = 1.0M
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an 18- ev photon is absorbed by a searsium atom in its ground level. as the atom returns to its ground level, what possible energies can the emitted photons have? assume that there can be transitions between all pairs of levels. give answers in as
energy of the photon = 18 ev
energy of the atom after it absorbs the photon,
=(-20 +18) ev = -2ev
the electron moves from level n=1 to n=4.
possible energies of the emitted photons: 3.0 ev, 5.0 ev, 8.0 ev, 10 ev, 15 ev, 18 ev
An electron is a negatively charged subatomic particle that can be both sure to an atom or free.
An electron that is sure to an atom is one of the 3 number one types of particles inside the atom -- the opposite are protons and neutrons. Collectively, electrons, protons and neutrons form an atom's nucleus.
The hydrogen atom, as an example, has simply one electron and one proton. The uranium atom, alternatively, has 92 protons, and therefore, 92 electrons.
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you need to make an aqueous solution of 0.174 m silver nitrate for an experiment in lab, using a 300 ml volumetric flask. how much solid silver nitrate should you add?
The mass of Silver Nitrate that is required to make 0.174M that is to be prepared in 300ml volumetric flask is 8.867214g
It is given that the molarity of the silver nitrate solution to be prepared is 0.174M and volume is 300ml. We know that molarity is given by,
Molarity = n/V
Rearranging the equation we get,
n = Molarity x Volume
On substituting the values we get,
n = 0.174 x 0.3L
n = 0.0522 moles
The molar mass of Silver Nitrate(AgNO₃) is given by 169.87g/mol.
The number of moles can be found using the following formula,
n = m/Molar mass
Rearranging the formula we get,
m = n x Molar mass
m = 0.0522 x 169.87
m = 8.867214g
The mass of silver nitrate that is required is 8.867214g.
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Identify the compound that does not have dipole-dipole forces as its strongest force.
The compound that does not have dipole-dipole forces as its strongest force is CO₂.
The CO₂ contains polar bonds. in this O is more electronegative than C but polarity are symmetrically opposite to one another and hence CO₂ is not a polar molecular. So, CO₂ does not have dipole dipole force as the strongest force. The strongest type of intermolecular forces are present in the CO₂ molecule is the van der waals force.
Thus, The compound that does not have dipole-dipole forces as its strongest force is CO₂.
the question is not complete , the complete question is:
Identify the compound that does not have dipole-dipole forces as its strongest force.
a) CO₂
b) CH₃I
C) CH₂Cl₂
d) CH₃OCH₃
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Draw the skeletal structure of an achiral 3° alkyl bromide with molecular formula c6h13br. There are multiple possible answers
The alkyl bromide with the formula C₆H₁₃Br is named as bromo-hexane. The Br if placed on any end carbon the compound will be achiral.
What is chirality?A molecule is said to be chiral if it contains an element with its each valency occupied by different groups. In a hydrocarbon chain a carbon atom can be chiral center if all the four valences of carbon is occupied by different groups.
Carbon occupied with same groups are achiral. Alkyl halides such as bromo hexane are formed by the reaction of alkanes with hydrogen halides.
Bromo hexane contains six carbon atoms, 13 hydrogen and one bromine atoms. The Br can be substituted to any carbon in the chain but to make it achiral Br should be placed on any end carbon as in the image.
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a buffer solution is formed by mixing equal volumes of 0.12mnh3(aq) and 0.10mhcl(aq), which reduces the concentration of both solutions by one half. based on the pka data given in the table, which of the following gives the ph of the buffer solution?
A two-fold dilution lowers a solution's concentration by a factor of 2, or by half of the initial concentration.
What is the solution described?In chemistry, a solution is a homogeneous mixture comprising two or more compounds in their relative proportions. The composition of the solution can be continually changed up to the solubility limit. Although solutions of gases or solids are possible, the term "solution" is most frequently used to refer to the liquid condition of matter.
A solution example is what?A solution is a homogeneous mixture of substances having particles less than one nanometer in size. Solutions come in a wide variety of forms, including seltzer water, sodium chloride treatments, and others.
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the compound sodium bromide is a strong electrolyte. write the reaction when solid sodium bromide is put into water.
When solid sodium bromide is added to water, the reaction is
NaI(s) → Na⁺(aq) + I⁻(aq)
What is meant by electrolyte?A medium that contains ions and conducts electricity due to the movement of those ions but not due to the movement of electrons is called an electrolyte. Most soluble salts, acids, and bases that have been dissolved in a polar solvent, like water, fall under this category. When dissolved in water, electrolytes are materials that have a natural electrical charge that is either positive or negative. In addition to other things, they support your body's ability to control chemical processes and keep the fluid levels inside and outside of your cells in equilibrium. Minerals with an electric charge called electrolytes are found in your blood and other bodily fluids. Numerous factors, such as: The body's water content, are impacted by electrolytes on how it functions. Your blood's acidity (pH) The action of your muscles.The chemical formula of sodium iodide is NaI. When NaI is dissolved in water, it dissociates into sodium ions (Na⁺) and iodide ions (I⁻). One mol of NaI gives 1 mol of Na⁺ ions and 1 mol of I⁻ ions.
Therefore, the chemical equation for the dissociation is the following:
NaI(s) → Na⁺(aq) + I⁻(aq)
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how many moles of carbon dioxide would have to be added at constant temperature and volume to increase the amount of carbon monoxide to 0.3000.300 mol once equilibrium has been reestablished?
Once equilibrium has been restored, 0.300 mol of carbon monoxide would be produced by adding 1.302 moles of carbon dioxide at a constant temperature and volume.
What are carbon monoxide's four symptoms?Headache, dizziness, weakness, nausea, upset tummy, vomiting, chest discomfort, and confusion are the most typical signs of CO poisoning. The most common symptoms of modest carbon monoxide exposure are headaches, tiredness, and nausea. Unfortunately, because the symptoms frequently resemble the flu, they are readily missed.
What symptoms of carbon monoxide are there?The most common symptoms of CO poisoning include headache, dizziness, exhaustion, nausea, vomiting, tightness in the chest, and disorientation. Before showing any symptoms, CO poisoning can kill those who are asleep or who have consumed alcohol.
Briefing:Reaction :CO +H₂O ⇔ CO₂ + H₂
initially 0.2 0.2 0.75+x 0.75
reaction 0.1 0.1 0.1 0.1
product 0.3 0.3 0.65+x 0.65
Kc=(0.650+x) (0.65)/0.3*0.3
14.1(0.09)=0.4225+0.65x
1.269 - 0.4225 = 0.65x
0.8465 = 0.65x
x=1.302
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15. Crushing large stones into smaller stones is an example of a
b. chemical change
a. physical change
c. both a. and b.
d. a change in mass
Answer:
Crushing large stones into smaller stones would be a physical change because you are merily crushing its physical size, while the chemical composition for the stone stayes the same.
How do you check the correct temperature of food?.
Utilizing a food thermometer is the best way to determine when your food is prepared.
Using food thermometers to analyze Get the greatest flavor out of food by cooking it to a safe temperature, avoiding overcooking, and Safely handle and store food.
You've probably heard that chicken is done when the inside is not pink and that hamburgers are ready when their juices run clear. Well, it can be challenging to evaluate those standards sometimes. Utilizing a food thermometer is the best way to determine when your meal is prepared. You won't be able to be assured that dangerous bacteria have been eliminated from your food until it reaches a specific temperature.
Hence, food thermometer ensure optimum cooking of food.
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Write a balanced half-reaction describing the reduction of aqueous zinc cations to solid zinc.
The balanced half-reaction describing the reduction of aqueous zinc cations to solid zinc is Zn²⁺ (aq) + 2e- ----> Zn (s)
Zinc(II) cations gain two electrons and became solid zinc with neutral charge.
Reduction lowers the oxidation number because an element or ion gains electrons. Reduction takes place at the cathode.
Oxidation reactions increase the oxidation number of an element because the element or ion lost electrons in a chemical reaction. Oxydation takes place at the anode.
Therefore,the balanced half-reaction describing the reduction of aqueous zinc cations to solid zinc is Zn²⁺ (aq) + 2e- ----> Zn (s)
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