stoichiometry

empirical formula

100

What is the empirical formula of C₁₂O₆?

C₂O

200

What is the empirical formula of N₅O₃?

N₅O₃

300

If a sample of N₅O₃, written in the empirical formula, is found to have a molar mass of 354g/mol, what is the molecular formula? (HINT: calculate molar mass)

N₁₅O₉

400

Calculate the empirical formula for a substance containing 1.11 g of Se and 1.61 g of F?

SeF₆

500

Find the empirical formula of a sample consisting of 28.03% Mg, 21.60% Si, 1.16% H, and 49.21% O. 

Mg₃Si₃H₃O₈

Molarity

100

What is the universal solvent? 

Water 

200

What is molarity? 

M = moles solute / liters of solution 

300

How many moles are in a solution with a Molarity of 0.14M? 

0.14 mol 

400

What is the molarity of a 0.0369 mg sample of CaCl₂ dissolved in 160. mL H₂O? 

2.08 * 10^-6 M

500

How much volume of a 16.31 M solution is needed to dilute it to a final molarity of 60.3 M, with a final total volume of 9103.1 mL? 

33.7 L

Reactions

100

Balance the following: 

_NaCl(aq) + _F₂ (g) —> _NaF (s) + _Cl₂ (g)

2NaCl (aq) + F₂ (g) —> 2NaF (s) + Cl₂ (g)

200

Balance the following: 

_HCl + _Ba(OH)₂  —> _H₂O  + _BaCl₂

2HCl + Ba(OH)₂  —> 2H₂O  + BaCl₂

300

What is the molar mass of the newly formed ionic compound produced in the following single displacement reaction? 

Cu(s) + 2AgNO₃(aq) --> Cu(NO₃)₂(aq) + 2Ag(s) 

187.554 g/mol

400

Identify the reaction TYPE: 

Pb(NO₃)₂ (aq) + 2NaI (aq) —> PbI₂ (s) + 2NaNO₃ (aq) 

Precipitation Reaction 

500

Perform the double displacement reaction:

Reaction between sodium sulfate and strontium chloride 

Na₂SO₄ + SrCl₂ —> 2NaCl + SrSO₄

atoms

100

How many atoms are there in 1 mole of anything? 

6.02214*10²³ atoms

200

How many atoms are there in 6.2 moles of sodium hydroxide?

3.7*10²⁴ atoms 

300

How many atoms are there in 16.3 g of sodium nitrate?

1.15*10²³ atoms 

400

How many atoms are in 12.9 mg of calcium bicarbonate? 

4.79*10¹⁹ atoms

500

How many atoms are there in 0.030 kg of hydrosulfuric acid?

5.3*10²³ atoms 

density

100

Wood has a density of 0.53 g/cm³. What is the volume of 64.90 g of wood? 

1.2*10² cm³ 

200

What is the density of a substance with a mass of 10 g and a volume of 5 mL?

2 g/mL

300

What is the density of a substance with a mass of 1.50050 * 10³ mg and a volume of 16.3L ? 

9.21*10^-5 g/mL

400

What is the volume (in mL) of 20.03 kg of a substance given that it's density is 9.6 g/mL? 

2.1*10³ mL

500

What is the density of a 9.0001 kg solid with a volume of 16.50 L of volume? 

0.5455 g/mL