Ch. 7 Formula Math

Front

What is the molar mass of AuCl3?

Back

303.3 g

Front

Name the ionic compound MgSO4•7H2O.

Back

magnesium sulfate heptahydrate

Front

What is the percent by mass of magnesium in MgO?

Back

60%

Front

What is the molecular formula for glycerol with a molar mass of 92.09g/mol and percent composition of 39.12% C, 8.75% H, and 51.12% O?

Back

C3H8O3

Front

Find the percent composition of Cu2S.

Back

%Cu= 79.854 %S= 20.145

Front

Define molar mass.

Back

The mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

What is percent composition?

Back

The percentage by mass of each element in a compound.

Front

How do you calculate the molar mass of a compound?

Back

Add the molar masses of all the atoms in the compound's formula.

Front

What is the formula for calculating percent by mass?

Back

(mass of element in 1 mole of compound / molar mass of compound) x 100%.

Front

What is an ionic compound?

Back

A compound formed from the electrostatic attraction between oppositely charged ions.