Moles Test

What is a mole based on?

A mole is based on how many particles are in one mole, specifically 6.02 x 10^23.

How do you convert moles to grams?

y moles x molar mass/1 mole.

What is the conversion from moles to particles?

X moles x 6.02 x 10^23/1 mole.

When do you use the terms atoms, molecules, and particles?

Atoms refer to individual elements, molecules refer to covalent compounds, and particles refer to ionic compounds.

How do you calculate molar masses of compounds?

Find each element's atomic mass, multiply it by how many of each element there is in the compound, and add all the elements' total mass together.

What is the equation for percent composition?

% comp = element mass / compound mass x 100.

What is the first step in determining empirical formulas from % composition data?

Convert % into grams, assuming a 100g sample.

What is used to find the mole ratio when determining empirical formulas?

Divide each mole value by the smallest mole value.

How do you find a molecular formula from an empirical formula?

Find the molecular mass of the empirical formula, then the original formula's molecular mass, and find the multiplier by dividing molecular mass by formula mass.

What is molarity (M) a measure of?

The number of moles of solute dissolved in liters of solution.

What is the equation for calculating molarity?

Molarity = moles of solute/liters of solution.

What does the dilution equation M1V1 = M2V2 represent?

M1&V1 are the initial molarity and volume; M2&V2 are the final molarity and volume.

What units are required for molarity (M) and volume (V)?

Molar and either ml or L.