Molar Mass, Mole Conversion, and Percent Composition

What units are used for molar mass?

• mol

• grams (g)

• grams per mole (g/mol)

• Molecules

• 1 mol = 201 g

• 1 mol = 461 g

What do you always start your conversion table with?

• The molar mass

• 1 mol = molar mass

• The given

The mass, in grams, of a mole of a substance.

• molar mass

• Avogadro's number

• mole ratio

• limiting reactant

Tags

NGSS.HS-PS1-7

The percentage by mass of each element in a compound

• dimensional analysis

• percent composition

• percent yield

• limiting reactant

The sequential application of conversion factors expressed as fractions and arranged so that any dimensional unit can be cancelled out until the desired set of dimensional units is obtained.

• mole

• atomic mass unit

• dimensional analysis

• equivalence statement

A ratio expressed as a fraction that equals one.

• limiting reactant

• conversion factor

• mole

• excess reactant

How many grams are in 1.2 x 10²⁴ atoms of C?

• 29.34 grams

• 23.94 grams

• 6.02 grams

• 1.21 grams

What is the percent composition by mass of sulfur (S) in the compound MgSO₄?

• 20.22%

• 19.85%

• 26.64%

• 28.64%

Calculate the number of atoms in 0.0340 g Zn.

• 5.200 x 10^-4 atoms Zn

• 3.130 x 10²³ atoms Zn

• 3.130 x 10²⁰ atoms Zn

• 1 atom Zn

Tags

NGSS.HS-PS1-7