Calculating Molecular Mass Questions

 

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Question 1:

Calculate the mass of 1 mole of CO2.

 

Question 2:

Calculate the mass of 1 mole of SO2.

 

Question 3:

What is the molar mass of KI?

 

Question 4:

What is the molar mass of NH4F?

 

Question 5:

What is the mass in grams of 6.02 x 1023 molecules of CO?

 

Question 6:

Calculate the mass in grams of 3.01 x 1023 molecules of F2.

 

Question 7:

What is the molecular mass of CCl4?

 

Question 8:

What is the mass, in grams, of 0.10 mole of HCl?

 

Question 9:

Given 58 grams of butane (C4H10) molecules:

(a) What is the molecular mass of butane?

(b) How many moles of molecules of C4H10 are present?

(c) How many molecules of C4H10 are present?

(d) What is the total number of atoms in each molecule of C4H10?

(e) What is the total number of moles of atoms in each mole of C4H10 molecules?

(f) What is the total number of moles of atoms in the sample?

(g) What is the total number of atoms in the sample?

 

Question 10:

(a) Determine the mass, in grams, of one gold atom. One mole of gold atoms has a mass of 197 grams.

(b) A person has a filling that contains 0.296 gram of gold. Goldwise, how many moles are their molar?

 

Question 11:

If the molecular mass of sulfur is 256.8 and its atomic mass is 32.1, what is the formula of the sulfur molecule?

 

Question 12:

How many moles are present in each of the following:

(a) 36.0 grams of water (H2O)?

(b) 8.5 grams of ammonia (NH3)?

(c) 6.35 grams of copper?

(d) 2.16 grams of silver?

(e) 0.85 grams of silver nitrate (AgNO3)?

(f) 7.10 grams of chlorine gas?

 

Question 13:

What is the mass, in grams, of each of the following?

(a) 1.00 mole of sulfur dioxide?

(b) 2.5 moles of carbon monoxide?

(c) 0.10 mole of hydrogen fluoride?

(d) 0.50 mole of oxygen gas?

(e) 0.50 mole of aluminium?

(f) 0.040 mole of trisodium phosphate (Na3PO4)?

 

Question 14:

Consider the following data:

Element   Atomic Mass

A          12.01

B          35.5

A and B combine to form a new substance, X. Four moles of B atoms combine with 1 mole of A atoms to give 1 mole of X molecules. Write the equation for the process. What is the mass of 1 mole of X?

(a) 47.5 g 

(b) 74.0 g? 

(c) 83.0 g?

(d) 154.0 g?

(e) 166.0 g?

 

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