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Moley Moles
"Stoiched" about Chemistry
High Speed Conversions
Reactants and Yield
Old School
100
6.02 x 10^23
What is Avogadro's number?
100
The mathematical relationships in chemical reactions
What is stoichiometry?
100

This is the volume 0.622 mol of a gas occupies at STP.

What is 13.9 L?

100
This is the equation for percent yield.
What is actual yield divided by theoretical yield?
100

The abbreviation STP stands for this, which means the conditions are 0 degrees Celsius and 1 atmosphere.

What is Standard Temperature and Pressure?

200
6.02 x 10^23 representative particles
What is a mole?
200
This is the number of grams of nitrogen that are present in 2 moles of HNO3.
What is 28 grams?
200

A sample has 25.7 g of calcium oxide. This is the number of moles of calcium oxide contained in the sample?

What is 0.458 mol?

200

2HCl + Ba → BaCl2  + H2 25.0 g of BaCl2 are recovered from the reaction above. If  the expected yield was 30.8g, this is the percent yield.

What is 81.2%

200

The number of significant figures in 304.00 x 10^5

What is 5?

300
The atomic mass of an element converted into grams
What is molar mass?
300
2Na + 2H2O → 2NaOH + H2     This is the mole ratio of dihydrogen monoxide to sodium hydroxide.
What is 2 moles to 2 moles?
300

This is the number of molecules in 48.0 grams of oxygen gas (O2).

What is 9.03 x 10^23?

300

Zn + 2HCl → ZnCl2 + H2 In the equation above, what is the limiting reactant when 6 g of Zinc reacts with 4 g of Hydrogen Chloride?

What is HCl?

300

A student performed a chemical reaction that was expected to produce 65.2 g of product. The experiment only produced 62.5 g when performed in the lab. This number is his percent error.

What is 4.14%?

400
The mass of a mole of Ca(OH)2
What is 74?
400
8Fe + S8  → 8FeS    This number of grams of iron are needed to react with 30.0 g of sulfur.
What is 52.3 grams?
400

CH4 + 2O2 → CO2 + 2H2O If 1.0 mole of methane reacts with oxygen to produce  carbon dioxide and water, what mass of water is produced?

What is 36 grams?

400

2NBr3  + 3NaOH → N2  + 3NaBr + 3HOBr.   This is the excess reagent when 41 moles of NBr3 react with 48 moles of NaOH?

What is NaOH?

400

If carbon has an atomic weight of 12.011 grams, what is carbon's percent composition found in ethanol C2H5OH?

What is 52%?

500
The number of liters of one mole of any gas @ STP.
What is 22.4 L?
500
What is the mass of one mole of CO2
What is 44 g?
500

A hot air balloon held 1,365 liters of air at standard temperature. This is the volume of the air when its temperature was increased to 27°C? Assume the pressure was constant.

What is 1,500 L?

500

___C6H10 + ___O2  → ___CO2  + ___H20 Once the equation is balanced... If I have 45 g of C6H10 and 30 g of O2, this is the limiting reagent.

(Extra 60 seconds)

What is O2?

(2 C6H10 + 17 O2  → 12 CO2  + 10 H20)

500

The oxidation number of manganese in MnO4-.

What is +7?