formula mass calculations

Question 1

What is formula mass?

Answer 1

The sum of the atomic masses of all atoms in a chemical formula.

Question 2

True or False: The formula mass of H2O is 18 g/mol.

Answer 2

True.

Question 3

Fill in the blank: The formula mass of NaCl is _____ g/mol.

Answer 3

58.44

Question 4

What unit is commonly used to express formula mass?

Answer 4

Grams per mole (g/mol).

Question 5

Calculate the formula mass of CO2 if the atomic mass of Carbon is 12.01 g/mol and Oxygen is 16.00 g/mol.

Answer 5

44.01 g/mol.

Question 6

Multiple Choice: Which of the following has the highest formula mass? A) CH4 B) C2H6 C) C3H8

Answer 6

C) C3H8.

Question 7

True or False: The formula mass of a compound is the same as its molar mass.

Answer 7

True.

Question 8

What is the formula mass of CaCO3?

Answer 8

100.09 g/mol.

Question 9

Fill in the blank: The formula mass of NH4Cl is _____ g/mol.

Answer 9

53.49

Question 10

Short Answer: Why is it important to calculate formula mass in chemistry?

Answer 10

It is essential for stoichiometry, determining yields, and calculating concentrations.