Answer:
CH3O
Explanation:
Hot filtration is a technique in which the mixture is heated and all the glassware is also heated for the filtration. When should you use the technique of hot filtration?.
A hot filtration should be used in the process of Crystallization.
What is Crystallization?This is the conversion of a chemical in liquid form to a crystalline solid. The crystal formed are repeating three-dimensional pattern or lattice.
Hot filtration is used in the process of Crystallization of a solid which contains impurities that are insoluble in the crystallization solvent and also to remove highly colored impurities from a solid.
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Graph the pH function using the graphing utility. Then answer the questions. What is the pH of lemon juice that has a hydrogen ion concentration of 0. 01 moles per liter? The pH is.
The pH of lemon juice has a hydrogen ion concentration of 0. 01 moles per liter is 2.
What is pH?pH is the measurement of acidity and basicity of any solution. The meaning of pH is potential hydrogen.
The acidity or basicity of any solution can be measured by pH scale, which is from 0 to 14.
The pH for neutral is 7 which is of pure water
The pH above 7 is base and pH below 7 is acids.
Thus, the pH of Lemon juice is 2.
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Why is Germanium more electronegative than Calcium?
PLEASE HELP!!
Answer:
b/c the line of electronegativity pass through germanium
What process causes the banks of the Dead Sea to look the way they do?
a kingdom is the smallest group of which living things are classified , true or false?
this is a science question
Answer:
false
Explanation:
This is false. The order is:
Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species
As you can see, kingdom is actually the second largest group in which a living thing can be classified into therefore it is false.
13. What does 2n^2 stand for?
Answer:
2n² is a formula that determines that the maximum number of electrons should be accommodated in a particular shell.
Explanation:
How many grams of O2 gas are in a 3700 mL container at a pressure of 775 mmHg at 33oC?
Answer:
4.8 grams
Explanation:
Use PV=nRT
P: 775 mmHg (divide by 760 mmHg to get atm) -> 1.02 atm
V: 3700 mL (divide by 1000 to get L) -> 3.7L
n: ?
R: (a constant) 0.0821L * atm/k *mol
T: 33 C (add 273 to get K) -> 306K
Move equation so n is on the side: PV/RT = n. Plug the numbers into the equation.
[tex]\frac{1.02atm * 3.7L }{306K} * \frac{K * mol}{0.0821L *atm} = 0.15 mol[/tex]
Then, convert moles to grams using the molar mass of O2 which is 32g/mol.
[tex]0.15 mol * \frac{32g}{mol}[/tex]= 4.8g
4.8g is the mass of oxygen gas which are in a 3700 mL container at a pressure of 775 mmHg at 33oC.
What is mass?A body's mass is an inherent quality. Prior to the discoveries of the atom as well as particle physics, it was widely considered to be tied to the amount of matter of a physical body. It was discovered that, despite having the same quantity of matter in theory, different atoms and elementary particles have varied masses.
There are various conceptions of mass in contemporary physics that are theoretically different but physically equivalent. The resistance of the body to accelerate (change of velocity) in the presence of a net force can be measured experimentally as mass.
PV=nRT
P= 775 mmHg/760 = 1.02 atm
V=3700 mL/1000 = 3.7L
n=
R=0.0821L× atm/k ×mol
T=33 C + 273=306K
1.02×3.7/0.0821×306= n
n=0.15 moles
mass = 0.15×32=4.8g
Therefore, 4.8g is the mass of oxygen.
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how do you find mole ratios?
In order to determine the mole ratio, you need to begin with a balanced chemical equation.
Select the correct answer. What is the molar mass of BaBr2? A. 217. 2 g/mol B. 297. 1 g/mol C. 354. 5 g/mol D. 434. 4 g/mol.
Answer:
B. 297.1
Explanation:
To fond molar mass you just add the atomic
masses together however many ttimes they appear. Eg. BaBr2 would be 137.33 + 2(79.9)
When HCl and NaOH react in an aqueoussolution, the H+ and OH− combine to form
They combine to form water
Neutralisation reactionA neutralisation reaction is a type of chemical reaction whereby an acid and base reacts in an aqueous solution
to form salt and water only.
For example, the acid HCl reacts with the base NaOH to give salt (NaCl) and water (H2O).
Positive sodium ions from NaOH and negative chloride ions from HCL combine to form the salt sodium chloride (NaCl).
While the H+ from the acid and OH− from base combine to form water.
Therefore, when HCl and NaOH react in an aqueous solution the H+ and OH− combine to form water.
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What causes water to runoff
A. The sun heats up earths surface
B. Water vapor condenses into water droplets
C. Water does not soak into the ground
D. There is a small amount of precipitation
Answer:
C
Explanation:
Runoff occurs when there is more water than land can absorb so it would be C.
Answer:
A
Explanation:
The sun heats up earths surface
If you had 2 oxygen atoms and 1 hydrogen atom, could you form a molecule?
Answer:
Yes!
Explanation:
You certainly could form something. It would be written as H02 and it is called Hydroperoxyl. This is formed by the transfer of a hydrogen atom to an oxygen atom.
copper wire consists of copper atoms connected through metallic bonds. find the moles of copper in 1.87 * 1024 copper atoms.
Avogadro's number
1 mole = 6.02.10²³ particles (atoms, molecules, ions)
[tex]\tt 1.87\times 10^{24}\div 6.02\times 10^{23}=\boxed{\bold{3.11~moles}}[/tex]
One mole of copper contains 6.02 × 10²³ copper atoms. Therefore, the number of moles that contains 1.87 ×10²⁴ copper atoms is 3.1 moles.
What is Avogadro number ?The number of atoms that constitutes one mole of a substance is called Avogadro number. It is equal to 6.02 × 10²³. Thus, one mole of every elements contains Avogadro number of atoms.
Similarly, one mole of a compound contains 6.02 × 10²³ number of molecules. Thus, one mole of carbon dioxide contains these much molecules.
Given the number of atoms of copper = 1.87 ×10²⁴
Then, no.of moles = number of atoms/ Avogadro number.
no.of moles =1.87 ×10²⁴ /6.022 × 10²³ = 3.1 moles.
Therefore, the number of moles of copper that contains 1.87 ×10²⁴ atoms is 3.1
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State the effect of
a. CO2
b. CO
c. So
d. NO2
Answer:
your answer is
Exposure to CO2 can produce a variety of health effects.CO can cause dizziness, confusion, unconsciousness and death.--development of asthma and potentially increase susceptibility to respiratory infections
hope it helps you Buddy
Explanation:
~Zayn
The fluid-filled area between the pleural layers is the.
The fluid filled area between the pleural layers is called the pleural cavity.
Give one example of erosion.
SCIENCE
Answer: a rock being in one place over a long time and eventually wearing away
Explanation:
:)
Which part of the scientific method is most likely to lead to changes in a theory?
A. hypothesis
B. results
C. methods
D. problem
Answer:
problem I think.
Hope this helps.
Can someone please help!! Name the parts making the male part of the flower. And state what each part does please don’t search up the answers and put it into your own words it would mean alot
Answer:
Anther: It produces pollen.
Filament: It hold the anther.
Anther and filament together make the stamen.
Mark as Complete
Broken Bonds Quick Check
5 of 5
Use the reaction and bond information to answer the question.
dis a
ade of atoms that
electrons in two
when electrons are
e atoms then have
bond. A chemical
form. The breaking
reactions,
CH8 - CH + H2
Reactant bond energies: H-C = 413 kJ/mol, C-C single bond = 347 kJ/mol
Product bond energies: H-C 413 kJ/mol, C=C double bond = 614 kJ/mol, H-H-
432 kJ/mol
Based on the bond energies, is this reaction endothermic or exothermic? Why or why
not?
(1 point)
bonds of the
nergy is called the
nds are not all the
onds are easier to
ble and are harder to
ands,
This reaction is exothermic, because stronger bonds are broken than
formed
The reaction is exothermic, because stronger bonds are formed than
broken
The reaction is endothermic, because stronger bonds are formed than
broken
The reaction is endothermic, because stronger bonds are broken than
formed
Based on bond energies, the reaction is endothermic, because stronger bonds are broken than formed.
What is the total change in bond energy?The total change in bond energy of a reaction is calculated using the formula below:
Total change in bond energy = sum of energies of bonds broken - sum of energies of bonds formed.A reaction is exothermic if the total change in bond energy is negative meaning that stronger bonds are formed than broken.
A reaction is endothermic if the total change in bond energy is positive meaning that stronger bonds are broken than formed.
Given a reaction such as: C2H6 → C2H4 + H2
Sum of energies of bonds broken:
C-C + 6 × H-C
347 + 6 × 413
Sum of energy of bonds broken = 2825 kJ
Sum of energy of bonds formed:
C=C + 4 × H-C + H-H
614 + 4 × 413 + 432
Sum of energy of bonds formed = 2725 kJ
Total change in bond energy = 2825 - 2725
Total change in bond energy = 100 kJ
Since the value of total change in bond energy is positive, the reaction is endothermic.
Therefore, the reaction is endothermic, because stronger bonds are broken than formed.
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If gatorade g series, endurance formula, contains 14 grams of carbohydrate per 8 ounces, how many ounces should a basketball player consume during the hour-long game?.
Based on recommended amount of carbohydrate, a basketball player should consume about 17 - 34 ounces of gatorade g series during the hour-long game.
How many ounces of endurance formula gatorade g series, endurance formula should a basketball player consume during an hour-long game if it contains 14 grams of carbohydrate per 8 ounces?Carbohydrates are food substances metabolized easily by the body to produce energy.
Given that the recommended amount of carbohydrate to consume to maintain performance is 30–60 g/h.
Also 14 grams of carbohydrate found in 8 ounces of the drink.
30 g of carbohydrate will be present in 30 × 8/14 = 17.1 ounces of gatorade g series
60 g of carbohydrate will be present in 60 × 8/14 =34.3 ounces of gatorade g series.
Therefore, a basketball player should consume about 17 - 34 ounces of gatorade g series during the hour-long game.
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It is important to allow each spot added to the chromatography paper to dry completely before adding another spot. Why is this so important?.
It is important to allow each spot added to the chromatography paper to dry completely before adding another spot in order to allow even separation of the solutes.
What is chromatography:Chromatography is the biological technique used to separate the constituent solutes of a solution using a stationary medium and a moving phase.
There are different types of chromatographic procedure including;
Paper chromatographyColumn chromatographyThin layer chromatographyIn paper chromatography, paper is used as the stationary medium. It is however, important to allow each spot added to the chromatography paper to dry completely before adding another spot in order to allow even separation of the solutes.
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Acid-Base Chemistry 1:Question 10
Read the statement.
An Arrhenius acid releases
into a solution. This causes the pH of the solution to
Which option correctly completes this sentence?
Select one
hydroxide ions, decrease
How many grams of CO2 are in 3.6 mol of CO2?
Explanation:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles CO2, or 44.0095 grams.
I hope you help:)
There are 158.4 grams of CO2 in 3.6 mol of CO2.
HOW TO CALCULATE MASS?The mass of a substance can be calculated by multiplying the number of moles of the substance by its molar mass. That is;
mass of CO2 = no. of moles × molar mass
According to this question, there are 3.6 moles of CO2.
mass of CO2 = 3.6 moles × 44g/mol
mass of CO2 = 158.4g.
Therefore, there are 158.4 grams of CO2 in 3.6 mol of CO2
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How much energy is required to evaporate grams of water?.
Answer:
energy known as the latent heat of vaporization is required to break the hydrogen bonds. At 100 °C, 540 calories per gram of water are needed to convert one gram of liquid water to one gram of water vapour under normal pressure.
Explanation:energy known as the latent heat of vaporization is required to break the hydrogen bonds. At 100 °C, 540 calories per gram of water are needed to convert one gram of liquid water to one gram of water vapour under normal pressure.
Answer:
100 °C, 540 calories per gram of water
Explanation:
ANSWER QUICK PLZ:How did our universe began -Science
Answer:
The big bang happened
Explanation:
Since the Big Bang, the universe has been expanding. In the early years, everything was made of gas. This gas, mostly hydrogen and helium, expanded and cooled. Over billions of years, gravity caused gas and dust to form galaxies, stars , planets, and more. The matter that spread out from the Big Bang developed into everything in the universe, including you. You are made of star stuff!
Answer:
The Big Bang Theory states that the Universe began in a single "explosion," or inflation event from which all of matter-energy and space-time took form. The latest estimates pinpoint this inception moment to have occurred about 13.8 billion years ago.
Explanation:
Big Bang theory
What product is obtained from the reaction of sulfuric acid acetic acid and 1 pentanol.
Answer: (1,3-dimethylbutyl) acetate
Explanation:
sorry if it wrong
(1,3-dimethylbutyl) acetate is the product from the reaction of sulfuric acid acetic acid and 1 pentanol.
what is the role of acetic acid ?Acetic acid is called as ethanoic acid found in many different products main component of vinegar, supply in the ingredients like apple cider vinegar.
It has a Chemical formula [tex]\rm C_2H_4O_2[/tex] can also be written as [tex]\rm CH_3COOH[/tex] or [tex]\rm CH_3CO_2H[/tex]. As it contain a carbon atom in the acetic acid structure, is considered an organic compound.
Acetic acid is a colorless liquid with strong and pungent smell. The undiluted form of acetic acid or ethanoic acid is known as glacial acetic acid.
Although Acetic acid is a weak acid but its concentrated form is act as a corrosive substance and can cause some damage to the skin. It can be used for manufacture of acetic anhydride, cellulose acetate, acetic esters, plastics, dyes, etc.
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which of the following is not an example of a physical property?
a. freezing point
b. reactivity
c. boiling point
d. density
Reactivity.
All the others are examples of a physical property.
Lift up the glass in one bowl, and place an effervescent tablet in the water beneath it. Quickly place the inverted glass over the tablet, and repeat the procedure with the other bowl. Note the changes in the water level and the air space in both glasses, and write down your observations.
The glass containing the effervescence tablet has a greater air space than the other.
What is effervescence?The term effervescence refers to the evolution of a gas. An effervescence tablet is a tablet that is designed to release the gas called carbon dioxide.
When we add the effervescence tablet and compare the level of the water in the two bowls, we will see that the water in the glass containing the effervescence tablet has a greater air space than the other.
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Which observations about the energy released in making the bonds are correct?.
The observation for the energy of making bond is released greater than the breaking bond, and the excess is converted to thermal energy.
The reaction for the formation of bonds is given as:
[tex]\rm CH_4\;+\;2\;O_2\rightleftharpoons C_4H_4O\;\rightleftharpoons CO_2\;+\;2\;H_2O[/tex]
What is the energy change?The reaction of the formation of product requires is released from the bond energy of the reactants. The energy of the reactant is released and is converted to chemical energy.
In the given reaction, the energy required in breaking bonds is less than the energy required in, making bonds.
The bond energy of the product molecules is less than the reactant, thus, the energy in making bonds released is greater, and the excess energy is converted to thermal energy.
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You are asked to prepare a nacl solution with the total volume of 50 ml. What is the best glassware for such purpose?.
For preparing a NaCl solution with a total volume of 50 ml, the best glassware to use would be a graduated cylinder.
Graduated cylinders are designed with clear and precise volume markings along their sides, allowing for accurate measurements of liquids.
With a 50 ml target volume, a graduated cylinder provides the necessary precision for measuring and mixing the correct amount of NaCl and solvent (usually water).
This glassware minimizes measurement errors and ensures the desired concentration of the solution. Its straightforward design and ease of use make the graduated cylinder a practical choice for small-volume solution preparation tasks.
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