What is the correct value for Avogadro's number?

How many moles of potassium are in 78.20 g K?

One mole of nitrogen has a mass of _____ g.

One mole of antimony has a mass of _____ g.

What is the molar mass of aluminum sulfate?

How many molecules (mlcs) of nitrogen monoxide are in a 22.5 g sample?

A lead fishing weight contains 0.19 mol of lead atoms.  What is the mass?

How many moles of O are in 12.8 mol Fe(NO₃)₃?

How many grams of O are in 3.2g of Ca(NO₃)₂?

a 700 gram iron ore sample was determined to contain 252 grams of iron.  What is the mass percent of iron in the ore?  (3 sig figs)

Ca(OH)₂

H₂ SO₄

Finish the neutralization reaction for the following acid and base:  HI(aq) + NaOH(aq)

pH=9.2

pOH = 12.1

pOH = 7

Calculate the [H₃O⁺] - pH = 2.87

Determine the pH of pOH = 8.5

a 25.00 mL sample of an HNO₃ solution is titrated with 0.102 M NaOH.  The titration requires 28.52 mL to reach the equivalence point.  What is the concentration of the HNO₃ solution? 

What are the products of the reaction between HBr(aq) and KOH?

V1P1 = V2P2

V1 / T1 = V2 / T2 

P1 / T1 = P2 / T2

P_tot=P1 + P2 + P3 . . . 

(V1P1) / T1 = (V2P2) / T2

V1 / n1 = V2 / n2

PV = nRT

STP

Convert 921 torr to atmospheres.

Convert 35.78 in Hg to mL Hg.

A reaction which forms a gaseous product is an example of a(n) . . .

A reaction which forms a solid product is an example of a(n) . . .

A reaction in which a substance reacts with oxygen, emitting heat and forming oxygen-containing compounds is an example of a(n) . . .

Which of the following is a chemical reaction?

Balancing chemical reactions is consistent with which scientific law?

When the equation, ___O₂ + ___C₅H₁₂ →→ ___CO₂ + ___H₂O is balanced, the coefficient of O₂ is:

An aqueous solution is . . .

In writing the chemical equation for a precipitation reaction, what abbreviation of the physical state must appear with one of the products?

Considering the following precipitation reaction:

Pb(NO₃)₂(aq) + 2KI(aq) →→ PbI₂(s) + 2KNO₃(aq)

Which ion(s) would NOT be present in the net ionic equation?

Methane gas (CH₄), on complete combustion in air, produces:

1. CO₂

2. H₂

3. H₂O

Which dangerous gas was responsible for the deaths of more than 1700 people at Lake Nyos in Cameroon, West Africa?

Suppose a vodka martini contains 30% alcohol with the remaining portion of the drink composed of water. What is the solute in this type of martini?

Solubility of gases in water:

Calculate the mass percent of a NaCl solution prepared by mixing 40.0 g NaCl with 125.0 mL of pure water.

Calculate the molarity of a KCl solution prepared by dissolving 0.898 moles of KCl in 250. mL of water.

How many moles of KCl are present in 125 mL of 2.10 M KCl?

What is the final concentration (M) of a solution prepared by diluting 50.0 mL of a 6.00 M KCl solution to a volume of 1.00 L?

Calculate the molality of 0.15 mol solute; 0.250 kg solvent (2 sig figs)

Calculate the molality of a solution prepared by dissolving 19.9 g of KCl in 750.0 mL of water.

What is the freezing point depression constant (K_f) for water?