Answer:
Below
Explanation:
Your answer should have the same number of S.D. as the element with the least number of S.D. ....in this case 3.88 has THREE S.D. so your answer should be rounded to three S.D.
15.222 - 3.88 = 11.342 = ~ 11.3 to three sig dig
which reaction is not a reduction–oxidation reaction? a) AgNO3 + NaCl -> AgCl + NaNO3. b) CH4 + O2 -> CO2 +H2O. c) Li + Cl2 -> LiCl. d) NaClO3 -> NaCl + O2.
The reaction that is not a reduction-oxidation reaction is:
c) Li + Cl2 -> LiCl.
The transfer of electrons from one substance to another is the foundation of a reduction-oxidation (redox) reaction. Lithium (Li) loses an electron to chlorine (Cl2) in this reaction, resulting in lithium chloride (LiCl). However, because neither lithium nor chlorine changes its oxidation state, this reaction is not considered a redox reaction.
On the other hand, all the other options involve the transfer of electrons from one substance to another, indicating a redox reaction.
a) AgNO3 + NaCl -> AgCl + NaNO3: In this reaction, silver (Ag) gains an electron to reduce from Ag+ to Ag, while chlorine (Cl) loses an electron to oxidize from Cl- to Cl2.
b) CH4 + O2 -> CO2 +H2O: In this reaction, carbon (C) loses electrons to oxidize from -4 to +4, while oxygen (O) gains electrons to reduce from 0 to -2.
d) NaClO3 -> NaCl + O2: In this reaction, chlorine (Cl) loses electrons to reduce from +5 to -1, while oxygen (O) gains electrons to reduce from +6 to -2.
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From the following compounds, identify the ones that are nonpolar covalent.
H2O
NCl3
AuCl3
ClO2
SF4
SO3
Answer:
The nonpolar covalent compounds are:
H2O (polar covalent)
NCl3 (polar covalent)
AuCl3 (ionic)
ClO2 (polar covalent)
SF4 (polar covalent)
SO3 (nonpolar covalent)
what is zn molar mass?
Zn has a molecular mass of 65.3800 g/mol. The mass of one mole of a material, measured in grams per mole (g/mol), is known as molar mass or molar weight.
What is molar mass?
Mass per mole is a definition of molar mass. In other terms, molar mass is the total mass of all the atoms in a substance that makes up a mole. It is measured in gram-per-mole quantities.
For atoms or molecules, molar mass is displayed. The molar mass is simply the element's mass expressed in atomic mass units in the case of solitary elements or individual atoms. To put it another way, an atom's atomic mass and molar mass are precisely equal. Molar mass can be used to determine a particle's identity because it is equivalent to atomic mass for individual atoms. He, for instance, has an atomic mass of 4. There is only one helium molecule in nature, meaning that it has only one atom, so its molar mass is also 4.
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Two blocks each of mass m are fastened to the top of an elevator has an upward acceleration a. The strings have negligible mass. (a) find the tensions t1 and t2 in the upper and lower strings in terms of m,a, and g. (b) compare the two tensions and determine which string would break first if a is made sufficiently large.(c) what are the tensions if the cable supporting the elevator breaks?
Two blocks each of mass m are fastened to the top of an elevator has an upward acceleration a, t₂=m₂g, b, (m₁+m₂)g, c, m₂=t/(a+g).
a) We may write the equilibrium equations for M₁ and M₂ as follows since there are only two forces operating on the blocks—tensions and weights, both of which are directed vertically.
t₁-t₂-m₁g=0
t₂-m₂g=0
the result of the second equation is
t₂g=m₂g
Which is the part A response.
b) We then enter this outcome into the first equation and get:
t₁-m₂g-m₁g=0
t₁=(m₁+m2)g
Which serves as the response to portion B.
c) We must first understand that the acceleration caused by mass M2 is equal to both the normal acceleration and the acceleration caused by gravity. T will exert the following stress on both objects:
t=m₂a+m₂g
t=m₂(a+g)
m₂=t/(a+g)
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What does CO2 do to the brain?
The CO₂ does to the brain is CO₂ increases the brain excitability and the Severe hypercapnia can cause the organ or the brain to damage.
The CO₂ that is the carbon dioxide is increase the brain excitability. The higher value of the CO₂ will cause the severe hypercapnia and it will cause the organ and the brain to damage and it will lead to the death.
The hypocapnia that is the low level of the CO₂ , that will reduces the blood flow in the brain by the narrowing the blood vessels. The Hyperoxia can also alters the speed of the heart rate and the blood pressure and the blood levels of the some of the hormones.
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How to make hydroxyquinoline at home with grapefruit?
It is not recommended to try to make hydroxyquinoline at home.
Hydroxyquinoline is also employed as an intermediary in the manufacture of medicines and other chemical molecules. Its antibacterial, anticancer, and antioxidant effects have been studied, and it has been utilized as a topical treatment and antiseptic for skin infections.
Hydroxyquinoline is a chemical compound that is used in various pharmaceutical products and should only be handled by professionals with proper training and equipment. Additionally, there is no evidence that grapefruit can be used to create hydroxyquinoline. It is important to consult with a professional before attempting to create any chemical compounds at home.
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You have 1 Liter of water and 1 Liter of orange juice. Explain how you would make a 50% solution of orange juice. EXPLAIN YOUR ANSWER.
Unpulped orange juice is a homogeneous combination. It's frequently referred to as a fix. No matter what portion of the combination we are looking at, the components are evenly dispersed.
How might one weaken a solution?Dilution is indeed the process of lowering a solute's concentration in a solution. It usually just involves mixing the solution with more solvent, such more water. A solution is diluted when more solvent is added without increasing solute.
What occurs when juice is diluted with water?As long as your serving size stays the same, diluting a sweet beverage with water reduces its calorie count. So if you decrease your sweet beverage yet still If you finish the entire drink, you won't actually consume fewer calories.
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what is hbr lewis structure ?
The HBr lewis structure is as follows :
. .
H - Br :
°°
In lewis structure of the HBr, the molecule is the diatomic molecule and is containing the only two atoms H and the Br that are linked with the each other with the single covalent bond in the straight line. The H atom will shared its one electron with the Br atom and will form the single covalent bond forming the straight line of the structure and therefore the HBr is a linear molecule.
The lewis structure of the HBr is as follows :
. .
H - Br :
°°
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what volume in milliliters of 0.512 m naoh is required to react completely with 25.0 ml 0.234 m h2so4
22.85 milliliters of 0.512 M sodium hydroxide will neutralize 25.0 milliliters of 0.234 M sulfuric acid.
What was sodium hydroxide used for?Manufacturers may use sodium hydroxide to produce soaps, rayon, paper, products that explode, dyes, and petroleum products. Other tasks that may use sodium hydroxide include processing cotton fabric, metal cleaning and processing, oxide coating, electroplating, and electrolytic extraction.
Why is sodium hydroxide harmful?Sodium hydroxide is overall considered safe for general use — but only in small amounts, at lower concentrations. At higher concentrations, sodium hydroxide is unsafe. It can cause chemical burns, as noted above, along with hives and holes in your skin. It's also very harmful if you eat it or inhale its fumes.
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How you should protect you use while you are inserting glass tubing into a stopper?
When inserting glass tubing into a stopper, it is important to protect your hands and eyes to prevent injury.
Some general guidelines to follow: Wear gloves to protect your hands from sharp edges and potential exposure to hazardous materials. Consider using cut-resistant gloves or heat-resistant gloves, depending on the nature of the material you are working with.
Eye protection is also essential to prevent injury from flying glass or other debris. Wear safety glasses or goggles to protect your eyes.
Use proper technique when inserting glass tubing into a stopper. Lubricate the stopper and the tubing with a small amount of water, glycerin, or silicone grease to make the insertion easier and to reduce the risk of breakage.
Do not force the glass tubing into the stopper. Apply gentle, even pressure and twist the tubing slightly as you insert it into the stopper.
After insertion, check the glass tubing and the stopper for any signs of damage or stress. If there are any cracks, chips, or other damage, discard the glassware and start over with a new piece.
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Which agricultural practices result in methane emission? Select the two correct answers.a. clearing land for farmsb. refrigerationc. manure management techniquesd. rice cultivation
The agricultural practices that results in methane emission is manure management. That is option C.
What is methane gas emission?Methane gas emission is defined as the release of large quantities of methane gas into the atmospheric region of the earth by production and transport of coal, natural gas, and oil, livestock and other agricultural practices, land use and by the decay of organic waste in municipal solid waste landfills.
The negative effects of the continuous emission of methane gas into the atmosphere would lead to global warming as it is one of the major greenhouse gases.
Manure management is one of the agricultural practices that can lead to the emission of methane gases.
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Significant figures include only the certain digits of a measurement True False
Significant figures are measure of resolution of a number that are reliable Significant figures include certain digits plus some uncertainty. Therefore, the statement is incorrect.
What are significant figures?Just the digits allowed by the measurement resolution are dependable, hence only these can be important figures if a number expressing the outcome of a measurement (such as mass, pressure, length, volume etc.) has more digits than the number of digits allowed by the measurement resolution.
The first three numbers (1, 1 and 4, showing 114 mm) are certain and hence significant figures if, for instance, a length measurement yields 114.8 mm and the smallest distance between markings on the ruler used in the measurement is 1 mm.
Significant figures also include uncertain but dependable digits. Even though there are other significant figures in this case, the final digit (8, which adds 0.8 mm), is also seen as significant. Therefore, the statement is false.
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The following reaction is an elementary process with ΔE equal to −109 kJ/mol.
CH3(g) + Cl2(g) → CH3Cl(g) + Cl(g)
The activation energy is 4 kJ/mol. What is the activation energy of the reverse reaction?
113 KJ/mol is the activation energy of the reverse reaction.
In physics and chemistry, activation energy seems to be the bare minimum of energy required for compounds to undergo a chemical reaction. A reaction's activation energy (Ea) is expressed in joules each for a mole (J/mol), joules per mole (kJ/mol), or kilocalories each for a mole (kcal/mol).
The magnitude of the potential barrier (also known as the energy barrier) separates minima of both the rate-dependent corresponding to the initial and ultimate thermodynamic states can be thought of as activation energy.
For a chemical change to progress at a reasonable rate, the system temperature should be high enough that there is a significant quantity of molecules with transcriptional energy at or greater than the activation energy. The phrase "activation energy" was coined.
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What is the simple definition of amino acid?
Answer: An amino acid is a type of organic compound that serves as the building blocks of proteins. It contains an amino group (-NH2) and a carboxyl group (-COOH), both attached to the same carbon atom, along with a side chain group that is specific to each amino acid. There are 20 different types of amino acids that can be found in nature, and they are essential for many biological processes, including the synthesis of proteins, enzymes, hormones, and neurotransmitters.
Explanation:
One student titrated the NaOH (aq) with 1.0 M HCl (aq) instead of 0.10 M HCl (aq). How would the student's titration curve differ from the original curve? a. the initial pH would be 11 instead of 13 b. the pH at the equivalence point would be 5 instead of 7 c. the pH far beyond the equivalence point would be higher than in the original curve d. the pH far beyond the equivalence point would be lower than in the original curve
The student's titration curve is differ from the original curve as the correct option is d. the pH far beyond the equivalence point would be lower than in the original curve.
The chemical equation is as follows :
NaOH + HCl ---> NaCl + H₂O
The pH far beyond is the equivalence point that would be the lower than in the original curve. The higher the molarity of the HCl, and the HCl that is hydrochloric acid is a strong acid, and that will be completely dissociate into the more moles of the H⁺ ions, therefore the lowering the pH value.
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What are density independent limiting factors?
Any force that affects only the size of a large group of living creatures irrespective of the density is a density-independent limiting factor.
In ecology, a density-independent factor, also known as a limiting factor, is any force that influences the size of a collection of living organisms regardless of population density. Chemical and biological manifestations are frequently responsible for density-independent factors.
Weather and climate factors, as well as inundating, wildfires, mudflows, and other disasters, affect a number of individuals of living things regardless of if individuals are crowded close together or evenly spread far apart.
For example, the degree of hydration is a density-independent factor for most organisms that exhale oxygen; if oxygen concentrations fall or breathable oxygen is suddenly made inoperable, such as when o2 plants are coated by rising flooded areas.
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analytical chemistry is a particular field within the broader spectrum of the chemical sciences, in which many times the focus of analytical experiments is to develop new methods to analyze compounds, either structurally or by determining concentrations of compounds. one of the processes analytical chemists use to determine the exact concentration of a working solution is called standardization. in your own words, describe the differences between a primary, secondary, and tertiary standard, and describe the underlying concept behind the standardization process. why is it done?
Standardization is a process used in analytical chemistry to determine the exact concentration of a working solution by preparing a standard solution of a known concentration and using it to calculate the concentration of an unknown solution, and there are three types of standards: primary, secondary, and tertiary.
Standardization is a fundamental process in analytical chemistry that involves determining the exact concentration of a working solution by preparing a standard solution of a known concentration and using it to calculate the concentration of an unknown solution. three types of standards used in the process are primary, secondary, and tertiary.
A primary standard is a highly pure and stable substance, while a secondary standard is not as pure or stable but is still sufficiently pure for most analytical purposes. Tertiary standards are solutions whose concentration has been determined by comparison with primary or secondary standards. Standardization is crucial for accurate and precise analytical experiments, especially in fields such as pharmaceuticals, environmental monitoring, and food safety testing.
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What is a glucose molecule made of?
Glucose molecule is made up of six carbon atoms, twelve hydrogen atoms, and six oxygen atoms.
A glucose molecule is a simple sugar or monosaccharide with the chemical formula . The arrangement of atoms in glucose is a six-membered ring containing five carbon atoms and one oxygen atom.
Glucose is an essential source of energy for living organisms, and it is commonly found in many fruits, vegetables, and sweeteners. It can also be synthesized in the body through the breakdown of more complex carbohydrates such as starch or glycogen. Glucose is also used in various metabolic pathways in the body and is a precursor for the synthesis of other important biomolecules such as amino acids and fatty acids.
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What is the bond angle of a tetrahedral?
The bond angle of a tetrahedral molecule is approximately 109.5 degrees. This is because a tetrahedron is a three-dimensional shape with four equivalent sp3 hybridized orbitals forming the corners of the tetrahedron.
Understanding Tetrahedral Bond AnglesThe bond angle of a tetrahedral molecule is one of the most fundamental and important concepts in chemistry. A tetrahedron is a three-dimensional shape with four equivalent sp3 hybridized orbitals forming the corners of the tetrahedron. These hybridized orbitals result from the combination of the s and p orbitals of the central atom, creating four orbitals that are directed towards the four corners of the tetrahedron.
Each orbital can form a bond with an adjacent atom or molecule, resulting in four identical bonds in a tetrahedral molecule. The ideal bond angle between adjacent bonds in a tetrahedral molecule is 109.5 degrees, which is due to the geometric arrangement of the orbitals around the central atom. The four orbitals are arranged such that they are as far apart from each other as possible, resulting in an angle of 109.5 degrees between adjacent bonds.
Examples of tetrahedral molecules include methane (CH4), which has four identical C-H bonds arranged around the central carbon atom, and carbon tetrachloride (CCl4), which has four identical C-Cl bonds arranged around the central carbon atom. The understanding of tetrahedral bond angles is important in various fields of chemistry, including organic chemistry, biochemistry, and materials science, and it provides a basis for understanding the properties and behavior of many molecules.
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Which radioactive isotope is used in geological dating? (1) U-238, (2) I-131, (3) Co-60, (4) Tc-99.
The radioactive isotope used in geological dating is U-238. Option 1 is correct.
U-238 (uranium-238) is a radioactive isotope commonly used in geological dating. It has a half-life of about 4.5 billion years, which means that it takes that amount of time for half of the original amount of U-238 in a rock to decay into other elements, such as lead. By measuring the ratio of U-238 to lead in a rock sample, scientists can estimate how long it has been since the rock formed.
I-131 (iodine-131) is a radioactive isotope used in medical treatments and diagnostic procedures, Co-60 (cobalt-60) is used in radiation therapy for cancer treatment, and Tc-99 (technetium-99) is used in medical imaging procedures. These isotopes have different half-lives and decay processes and are not used for geological dating.
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An ionic bond is an attraction between oppositely charged?
a. Ions
b. Polymatic
c. Noble Gas
d. Electrons
Burning fuels in power plants and motor vehicles emits carbon dioxide (co2) , which contributes to global warming. The co2 emissions (metric tons per capita) for countries varies from 0. 04 in burundi to 43. 86 in qatar. The data set, which contains information on 203 countries, is too large to display, but here are the data for the first 5 countries
The leading five nations in terms of carbon dioxide emissions (metric tonnes per person) are Afghanistan (0.30), Albania (1.96), Algeria (3.71), Andorra (6.40), and Angola (1.06).
For the first five nations in the data set, the carbon dioxide emissions (measured in metric tonnes per person) are as follows: Afghanistan is rated as 0.30, Albania is 1.90, Algeria is 3.70, Andorra is 5.80, and Angola is 1.20. According to the statistics, there are huge differences between the CO2 emissions that various nations produce per person, with some producing very little and others producing a lot. This diversity can be linked to a variety of things, such as disparities in economic growth, energy use, and governmental environmental protection measures. In order to combat the consequences of global warming and the problems posed by climate change, it is imperative to reduce CO2 emissions.
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Calculate the mass of iron sulphide produced when 320g of sulphur is reacted with excess iron
The concept stoichiometry is used here to determine the mass of iron sulphide produced. The mass of FeS formed from 320g of sulphur is 878.5 g.
What is stoichiometry?The stoichiometric concept is generally used for the calculations of masses and sometimes the volumes and reactants and products involved in a chemical reaction. The relationship between the amounts of reactants and products can be obtained in a chemical reaction.
Molar mass of 'Fe' = 55.85 g/mol
Molar mass of 'S' = 32 g/mol
The molar mass of FeS = 55.85 + 32 = 87.85 g/mol
The reaction between 'Fe' and 'S' is:
Fe + S → FeS
Here 1 mole of FeS is formed from 1 mole of 'S'.
The amount of FeS formed by 32 g 'S' = 87.85 g
The amount of FeS formed by 320 g of 'S' = (320 × 87.85) / 32 = 878.5 g.
Thus the mass of 'FeS' produced is 878.5 g.
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Which type of isomers are dimethyl maleate and dimethyl fumerate?
The dimethyl maleate and dimethyl fumarate are diastereomers. These are two molecules which are stereoisomers.
Diastereomers are defined as a type of stereoisomer. These are defined as non-mirror image, non-identical stereoisomers. Diastereomers occurs when two or more stereoisomers of a compound have different configurations at one or more of the equivalent stereocenters and are not mirror images of each other. These are two molecules which are stereoisomers containing same molecular formula, same connectivity, different arrangement of atoms in space but are not enantiomers. The Enantiomers are mirror images of each other and non-superimposable. Diastereomers are not mirror images of each other and non-superimposable like enantiomers.
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Liquid fats tend to have a high proportion of ____________ fatty acids.
a. Polyunsaturated
b. Saturated
c. Hydrogenated
d. Trans
Liquid fats, such as vegetable oils, typically come from plant sources that are high in unsaturated fats, including both monounsaturated and polyunsaturated fats.
What are monounsaturated and polyunsaturated fats ?
Monounsaturated and polyunsaturated fats are types of unsaturated fats.
Monounsaturated fats are a type of fat that is typically liquid at room temperature and becomes solid when chilled. They are found in high amounts in foods such as olive oil, avocado, nuts, and seeds. Consuming monounsaturated fats in place of saturated fats can help improve blood cholesterol levels and reduce the risk of heart disease.
Polyunsaturated fats are another type of unsaturated fat. They are typically liquid at room temperature and also when chilled. Polyunsaturated fats are found in high amounts in foods such as vegetable oils, fatty fish, nuts, and seeds. Two types of polyunsaturated fats that are especially beneficial for health are omega-3 and omega-6 fatty acids. Omega-3 fatty acids are found in fatty fish, such as salmon and sardines, as well as in flaxseed and chia seeds. Omega-6 fatty acids are found in vegetable oils, such as corn, soybean, and sunflower oils. Consuming a balance of omega-3 and omega-6 fatty acids can help improve heart health and reduce inflammation.
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Disaccharides consist of __________ molecules of sugar joined together.a. 2b. 4c. 6d. 8
Disaccharides consist of (a) 2 molecules of sugar joined together.
What are Disaccharides?A disaccharide is a type of carbohydrate molecule made up of two monosaccharide (simple sugar) molecules joined together by a glycosidic bond. Common examples of disaccharides include sucrose (table sugar), which is made up of glucose and fructose molecules, and lactose (milk sugar), which is made up of glucose and galactose molecules. Other examples of disaccharides include maltose, which is made up of two glucose molecules, and trehalose, which is made up of glucose molecules in a unique alpha, alpha-1,1 linkage. Disaccharides are broken down by enzymes in the digestive system into their individual monosaccharide units for absorption into the body.
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when a thermometer is placed in a substance, what is it actually measuring?
A thermometer is a device used to gauge temperature. It may gauge the temperature of a solid substance, like food, a liquid substance, like water, or a gas, like air.
Describe a thermometer?It was created to measure the temperature of the human body. It is a lengthy, narrow glass tube with a mercury-filled bulb at the end. A person's body temperature typically ranges from 35 to 42 degrees Celsius, or 37 in Celsius. This is why the clinical thermometers have a range of 35 to 42 C.
What measurement determines the energy content of a substance?The joule is the SI unit for all three types of energy (J). The energy required to change the temperature of a substance or object is measured using the terms specific heat and heat capacity.
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why do you think the production of wool in decreasing in india
Outdated and inadequate pre- and post-loom processing facilities. Ineffective role of state wool marketing organizations. Lack of a Minimum Support Price (MSP) system. No educational institute for wool technology.
What is an organization?
Sociology can be summed up as the study of modernity's institutions; certain institutions have a purpose, much like the individual organs in a well-functioning body. An "organisation" may be more broadly defined in the social and political sciences as the planned, coordinated, and intentional behaviour of people acting together to accomplish a common objective or create a physical object. Often, official membership and form frame this action (institutional rules). Organizations can be classified in sociology as planned formal organisations or unplanned informal (i.e., impromptu) groups. Sociology examines organisations first and foremost from an institutional angle. In this regard, the organisation is a stable combination of components. Rules govern these components' behaviour, ensuring that.To know more about organization, click the link given below:
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c o2 → co2 (m o2 = 32 g/mol; m co2 = 44 g/mol) when 78.0 g of carbon dioxide (co2) are produced, what mass of oxygen is present in the product?
56.7 g oxygen. One carbon atom is covalently doubly bound to two oxygen atoms in each of the molecules that make up carbon dioxide, which has the chemical formula CO2.
At room temperature, it exists as a gas. In the atmosphere, carbon dioxide serves as a greenhouse gas because it absorbs infrared radiation despite being transparent to visible light.
It has increased from pre-industrial levels of 280 ppm to a trace gas in the Earth's atmosphere at 421 parts per million (ppm), or roughly 0.04% by volume (as of May 2022). The fundamental driver of both these elevated CO2 concentrations and climate change is the burning of fossil fuels.
Groundwater, lakes, ice caps, and oceans all contain dissolved carbon dioxide. As atmospheric CO2 concentrations rise, carbon dioxide dissolves in water to create carbonate, primarily bicarbonate (HCO 3), which contributes to the acidification of the ocean.
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What mass of silver would be deposited if a 6.5 A current is passed through an aqueous solution of silver nitrate for 8.0 minutes? A. 0.029 g B. 0.058 g C. 1.7 g D. 3.5 g
3.5 g of silver would be deposited if a 6.5 A current is passed through an aqueous solution of silver nitrate for 8.0 minutes. The answer is D.
mass of silver = current (in A) x time (in s) x molar mass of silver / 96500
Time = 8.0 minutes = 480 seconds
Amount of charge that passed,
charge = current x time
charge = 6.5 A x 480 s = 3120 C
Calculate the number of moles of silver deposited,
moles of silver = charge / Faraday's constant
moles of silver = 3120 C / 96500 C/mol = 0.032 mol
Mass of silver deposited using its molar mass,
mass of silver = moles of silver x molar mass of silver
mass of silver = 0.032 mol x 107.87 g/mol = 3.47 g
Hence correct option is D.
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