MCAT Chemistry: Molecular and Formula Weight

What is the molecular weight of a single water molecule in atomic mass units?

• 20 amu

• 16 amu

• 18 amu

• 22 amu

How many hydrogen atoms are present in a molecule of ethanol?

• 6

• 4

• 8

• 2

What is the molecular weight of ethanol in atomic mass units?

• 48 amu

• 46 amu

• 44 amu

• 50 amu

What is the numerical relationship between 1 amu and grams per mole?

• 1 amu = 10 grams

• 1 amu = 1 gram per mole

• 1 amu = 10 grams per mole

• 1 amu = 1 gram

What is Avogadro's number?

• 6 x 10^22

• 6 x 10^24

• 6 x 10^23

• 6 x 10^25

How many grams does one mole of carbon weigh?

• 13 grams

• 12 grams

• 11 grams

• 10 grams

What is the formula weight of sodium chloride in atomic mass units?

• 57 amu

• 56 amu

• 58 amu

• 55 amu

What is the molecular formula of glucose?

• C5H12O6

• C5H10O5

• C6H12O6

• C6H10O6

What is the molecular weight of glucose in atomic mass units?

• 160 amu

• 180 amu

• 190 amu

• 170 amu

Why is it important to memorize certain molecular weights for the MCAT?

• To avoid using a calculator

• To ensure accuracy in experiments

• To save time during calculations

• To impress the examiner