Sig Figs and Conversions
Balancing
Solubility
Stoichiometry
Redox Reactions
100

What is the sig fig for 0.43003400?

6

100

What is the balanced chemical formula for Na+1 and PO4-3?

Na3PO4

100

What does “soluble” mean?

Chemical mixes fully into solution. No solids appear. Solution looks clear.

100

Find the percent composition by mass of each element in Ni(NO3)2. Use 3 sig figs.

32.1% Ni

15.3% N

52.5% O

100

What is the difference between oxidizing and reducing? What is the difference between oxidizing agent and reducing agent?

Oxidizing and reducing agent mean that the element loses electrons or the charge becomes more positive.

Oxidizing agent and reducing mean that the element gains electrons or the charge becomes more negative.

200

324.5 x 43.0 ÷ 90.?

160 OR 1.6 x 102+

200

What is the balanced chemical formula for ammonium perchlorate?

NH4ClO4

200

What does “insoluble” or “slightly soluble” mean?

Chemical does not fully mix with solution. Solid particles are seen. Solution is "foggy" or "cloudy".

200

Find the empirical formula of a compound containing 14.64 g O, 16.43 g C and 2.3 g H.

C3H5O2

200

How do you make 2.50 L of 0.750 M Ba(NO3)2 from solid Ba(NO3)2?

Add 490. grams of Ba(NO3)2 and dilute to 2.5 L with H2O.

300

Convert 345302000 sec to years.

10.9495 years OR 1.09495 x 10+1 years

300

What is the balanced equation of the following:

_ Ba(NO3)2 + _ NaCl → _ BaCl2 + _NaNO3?

1 Ba(NO3)2 + 2 NaCl → 1 BaCl2 + 2 NaNO3

300

Is Na2SO4 soluble or insoluble/slightly soluble?

Soluble

300

Find the formula of a hydrate containing 56.1% LiNO3 and 43.9% H2O.

LiNO2 * 3H2O

300

How do you make 4.00 L of 0.250 M K2Cr2O7 from a 3.0 M stock solution?

Add 0.33 L of stock solution and dilute with 3.67 L of water.

400

Convert 3.00 mm/sec to mi/yr.

58.8 mi/yr OR 5.88 x 10+1 mi/yr

400

What is the balanced equation for the combustion of butane (C4H10)?

2 C4H10 + 13 O2 → 8 CO2 + 10 H2O

400

Is Iron III oxide aqueous or solid?

Aqueous

400

How many grams CO2 can be produced from 25.1 g C6H6 and 86.9 g O2?

84.8 grams of CO2

400

Label or state what is oxidized and reduced as well as the oxidizing agent and reducing agent.

Cu(s) + NO3-1(aq) → Cu2+(aq) + NO(g)

Cu is oxidized and the reducing agent.

N is reduced and the oxidizing agent.

500

Convert 87600 lb/m3 to mg/L.

3.97 x 10+7 mg/L

500

What is the balanced chemical equation of the double displacement of barium nitrate and aluminum sulfate?

3 Ba(NO3)2 + 1 Al2(SO4)3 → 3 BaSO4 + 2 Al(NO3)3

500

What are all the states of the acid-base reaction of potassium hydroxide and sulfuric acid? Write out the whole balanced equation.

1 Ba(OH)2(aq) + 1 H2SO4 (aq) → 2 H2O(l) + 1BaSO4(s)

500

What is the percent yield when you made 80. grams of carbon dioxide in the lab? 

(Based on question: How many grams CO2 can be produced from 25.1 g C6H6 and 86.9 g O2?)

94%

500

Balance the following redox reaction in basic solution.

Cl2(g) → Cl-1(aq) + OCl-1(aq)

Cl2(g) + 2OH-1 → Cl-1(aq) + OCl-1(aq) + H2O

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