1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nezavi [6.7K]
3 years ago
14

Which conversion factor correctly shows the relationship between moles and representative particles?

Chemistry
1 answer:
strojnjashka [21]3 years ago
8 0
This is given by Avogagro number: 1 mol = 6.02*10^23 particles

Then you can do whichever to these two relations, because they are equivalent:

- 1mol / 6.02*10^23 representative particles, and
- 6.02*10^23 representative particle /1 mol

Only the second option of the question includes one of the valid conversion factors. Then, the conversion factor of the second option is the right answer
You might be interested in
A 6.87-L sample of gas has a pressure of 0.732 atm and a temperature of 95 °C. The sample is allowed to expand to a volume of 9.
Jlenok [28]

Answer: The new pressure of the gas, assuming that no gas escaped during the experiment is 0.470 atm

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 0.732 atm

P_2 = final pressure of gas = ?

V_1 = initial volume of gas = 6.87 L

V_2 = final volume of gas = 9.22 L

T_1 = initial temperature of gas = 95^oC=273+95=368K

T_2 = final temperature of gas = 44^oC=273+44=317K

Now put all the given values in the above equation, we get:

\frac{0.732\times 6.87}{368}=\frac{P_2\times 9.22}{317}

P_2=0.470atm

Thus the new pressure of the gas, assuming that no gas escaped during the experiment is 0.470 atm

7 0
4 years ago
Which of the following is a chemical reaction?
stiv31 [10]

Answer:

d. The formation of a covalent bond between two amino acids

Explanation:

In a chemical reaction, a substance transforms into another with different chemical properties and a different formula. Bonds are created and/or destroyed. It must obey the law of conservation of mass and the law of conservation of elements.

<em>Which of the following is a chemical reaction?</em>

<em>a. Making a hydrogen bond between a water molecule and a sugar molecule. </em>NO. This is a physical change in which sugar dissolves in water but both their chemical identities remain the same. The hydrogen bond is a force of  attraction and not a real bond in which electrons are gained, lost or shared.

<em>b. The melting of ice.</em> NO. This is a physical change. Solid water turns into liquid water but the identity of the molecules is the same.

<em>c. Changing a carbon atom to a nitrogen atom by radioactive decay.</em> NO. This is a nuclear reaction in which a new element appears but it is not a chemical reaction because it does not fulfill the law of conservation of elements.

<em>d. The formation of a covalent bond between two amino acids.</em> YES. A new bond is created and a protein dimer is formed.

4 0
3 years ago
Can someone please help me?
Savatey [412]
A; Town A will be cooler than Town B because it is located near the peak of the mountain.
i believe is the correct answer
6 0
3 years ago
How many moles of KCl are in <br> 28g of KCl?
eduard

Answer:

0.38 moles KCl

Explanation:

(28 g KCl) / (74.55 g/mol KCl) = 0.38 moles KCl

7 0
3 years ago
Read 2 more answers
How much heat is required to decompose 25.5 grams of NaHCO3? 2NaHCO3(s) + 129 kJ 2Na2CO3(s) + H2O(g) + CO2(g)
Scrat [10]
The chemical equation is missbalaced.


The right balanced chemical equation is:


<span>2NaHCO3(s) + 129 kJ ---> Na2CO3(s) + H2O(g) + CO2(g)



Then, now you know that 2 moles of NaHCO3 requires 129 kJ heat, and you just need to convert 25.5 grams of NaHCO3 into number of moles to calculare the amount of heat needed.


A) Number of moles in 25.5 g of NaHCO3, n:

n = grams / molar mass


molar mass NaHCO3 = 23 g/mol + 1g/mol + 12g/mol + 3*16g/mol = 84 g/mol


n = 25.5 g / 84 g/mol = 0.304 mol


B) Heat required


Make the proportion with the theoretical ratio:


2mol / 129 kJ = 0.304 mol / x


=> x = 0.304 mol * 129 kJ / 2 mol =  19.608 kJ


Answer: 19.6 kJ
</span>
7 0
3 years ago
Other questions:
  • need help studying my chemistry.. I'm in 11th grade,and horrible in this subject...I study but it's like it won't sink in! Any s
    6·1 answer
  • The nucleus of the atom was discovered by what pioneering
    10·2 answers
  • You are investigating an organic compound. It has the following characteristics: an oxygen atom is bonded to two carbon groups,
    9·1 answer
  • What volume of a 2.5 M NaOH solution is required to make 1 liter of a 0.75 M NaOH?
    14·1 answer
  • Calcium salts give bone its a. tensile strength. b. torsional strength. c. flexibility. d. compressional strength.
    14·1 answer
  • What type of bond is formed when atoms share electrons?
    7·1 answer
  • The formula for a buffer solution contains 1.24% w/v of boric acid. How many milliliters of a 5% w/v boric acid solution should
    8·1 answer
  • 1. I am a vertebrate
    15·1 answer
  • What happens when you add a electron to a hydrogen atom
    13·1 answer
  • What are some examples of how science can help us in our everyday lives???
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!