Chapter 3- The Mathematics Of Formulas and Equations

Question 1

How do you find formula mass?

Answer 1

1. Multiply each element by their atomic mass

2. Then add for the formula mass

Question 2

What is the definition of percentage composition?

Answer 2

The percentage of composition of a substance represents the composition as a percentage of each element compared with the total mass of the compound

Question 3

How do you find the percentage of a specific element in a compound?

Answer 3

1. First determine the formula mass

2. then divide the mass of the specific element by the formula mass and times it by 100%

Question 4

What is the definition of a mole?

Answer 4

The number of atoms of carbon present in 12 g of C 12

Question 5

What is the number of particles in a mole?

Answer 5

6.022 x 10^ 23

Question 6

What is one mole of gas equal to?

Answer 6

1 mole of gas= 22.4 liters

Question 7

How do you convert grams to moles?

Answer 7

Moles= number of grams x 1mol/ gram formula mass

Question 8

How do you convert moles to grams?

Answer 8

Grams= number of moles x gram formula mass/ 1 mol

Question 9

What is the definition of formula mass?

Answer 9

Mass of the smallest unit of the compound