1.4.2-1.4.3 - Relative Atomic Mass, Formula Mass, and Molar Mass

Question 1

What isotope is used to determine the relative masses of all other elements?

Answer 1

C-12

Question 2

What units can be used for the mass found under each element on the periodic table?

Answer 2

atomic mass units or grams per mole

Question 3

How do you find molar mass for a molecule/compound?

Answer 3

add the molar masses of each element from periodic table according to chemical formula

Question 4

What is the formula for moles when the number of particles is known?

Answer 4

n=number of particles/avogadro’s #

Question 5

what is the formula for moles when mass is known?

Answer 5

n=mass (g)/Molar mass