Chapter 10 Test Review
Name:
1) What value is Avogadro’s number? 2) What is the amount of 1 mole? 3) How many moles of donuts do you have if you have 6.02 x 1023 donuts? 4) How many moles of ice cubes do you have if you have 6.02 x 1023 ice cubes? 5) If you have 8.5 x 1025 atoms of sulfur, calculate how many moles of sulfur you have.
6) If you have 3.6 moles of calcium chloride, calculate how many formula units of calcium chloride you have.
7) What is the molar mass of the compound, FeSO4?
8) If you have 6.8 mole of FeSO4, how many grams of FeSO4 is this?
9) How many atoms of magnesium are there in 9.25 grams of magnesium? (first convert grams to moles then convert moles to atoms)
10) What are formula units the representative particles of? 11) If you want to convert from mass to particles, what do you have to convert to first? 12) What is the percent composition of each element in the compound CaO?
13) What are atoms the representative particles of? 14) How many molecules are in 6.4g of SO2? ( it requires two steps to convert)
15) What is the percent of oxygen in the compound NO2?
16) What is the empirical formula of the molecule, butane, C4H10 ? 17) Is the formula of carbon dioxide, CO2, an empirical or molecular formula? Why? 18) Find the empirical formula of a substance that is composed of 14.87% P and 85.13% Cl.
19) What is the molecular formula of a compound that has an empirical formula of C4H4S and a molar mass of 168.28 g/mol?
20) Name the hydrates: a) NaCl 8H2O ď Š
21) Write the formulas of the hydrates: a) potassium nitrate tetrahydrate b) lithium chloride decahydrate
b) MgCl2 3H2O ď Š