Units 3 & 4 CMT Review OL

Front

How many moles are needed to make 2.5 L of a 3.8 M solution?

Back

9.5 mol

Front

What percentage of the total atomic mass of lithium phosphide (Li3P) is composed of lithium?

Back

40%

Front

A chemical formula that shows the actual number and kinds of atoms present in one molecule of a compound is called_________

Back

molecular formula

Front

Convert 28.0 grams of O2 to moles.

Back

0.875 moles

Front

What type of formula is Cu2O?

Back

empirical

Front

Define molarity.

Back

Molarity is the number of moles of solute per liter of solution.

Front

What is the formula to calculate moles from mass?

Back

Moles = Mass (g) / Molar Mass (g/mol)

Front

What is the molar mass of lithium (Li)?

Back

6.94 g/mol

Front

What is the empirical formula of a compound?

Back

The simplest whole number ratio of atoms in a compound.

Front

How do you calculate the percentage composition of an element in a compound?

Back

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