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100

What is the empirical formula?

The smallest whole-number ratio of elements in a compound.

100

What is the theoretical yield?

Theoretical yield is the maximum amount of product the could be obtained from the given quantities of the reactants.

100

What is a limiting reactant?

The limiting reactant is the reactant that is completely used in the reaction or runs out first.

100

Balance this equation:

N2H4 + O2 > H2O +N

N2H4 + O2 > 2H2O + N2

100

Wright a balanced equation for this:

Silicon Dioxide reacts with carbon to produce the element silicon and carbon monoxide

SiO2 + 2C > Si + 2CO

200

Write a balanced equation for this reaction:

Ammonia (NH3) burns in oxygen to produce elemental nitrogen and water.

2NH3 + 3O2 > 2N + 3H2O

200

The actual yield of a reaction is 1.2g and the theoretical result is 1.3g. What is the percent yield?

92%

200

N2 + 3H2 > 2NH3

We want to produce 2.75 moles of NH3. How many moles of nitrogen would be required?

1.375 moles of nitrogen

200

2Sr + O> 2SrO

How many grams of SrO would be produced from 1.75 moles of Sr?

181.335 grams of SrO

200

How many moles of KCl are produced from 45 grams of K2S?

MgCl2 + K2S > MgS + 2KCl

0.82 moles of KCL

300

3AgNO3 + AlCl> 3AgCl + Al(NO3)3

Calculate the mass of AgCl that can be prepared from 200.0g of AlCl3 and sufficient AgNO3

645.01 grams of AgCl

300

CaCl2 + 2Ag > 2AgCl + Ca

If 90.97 g of Ca is produced, how many grams of AgCl will be produced?

650.622g AgCl

300

36.5 grams of calcium react with 18.2 grams of oxygen to produce calcium oxide.

2Ca + O2 > 2CaO

What is the limiting reactant?

Calcium

300

36.5 grams of calcium react with 18.2 grams of oxygen to produce calcium oxide.

2Ca + O2 > 2CaO

What is the amount of the other reactant that is in excess?

3.4 grams

300

36.5 grams of calcium react with 18.2 grams of oxygen to produce calcium oxide.

2Ca + O2 > 2CaO

What is the amount of calcium oxide that is produced?

51.1 grams

400

A compound consists of 72.2% magnesium and 27.8% nitrogen by mass. What is the empirical formula?

Mg3N2

400

Benzene has the formula C6H6. Calculate its percent composition.

C: 92% H: 8%

400

How many moles of magnesium sulfide is needed to react with 145g of sodium chloride?

1.24 mol MgSO4

400

Ethyne has the formula C2H2. Calculate its percent composition.

C: 92% H: 8%

400

The percent composition of eicosene is 85.63% C and 14.37% H. Its molecular mass is 280 u.

What is its empirical formula?

CH2

500

A compound is found to have 1.121 g of nitrogen, 0.161 g of hydrogen, 0.480 g of carbon, and 0.640 g of oxygen. The molar mass of the compound is 180.21 g/mol. What is the molecular formula?

H12N6C3O3

500

3.5 grams of iron (II) react with 13.0 grams of copper (I) nitrate.

What is the amount of copper produced?

6. 58 grams

500

3.5 grams of iron (II) react with 13.0 grams of copper (I) nitrate.

What is the amount of the reactant that is in excess?

0.61 grams

500

3.5 grams of iron (II) react with 13.0 grams of copper (I) nitrate.

What is the limiting reactant?

CuNO3

500

The percent composition of eicosene is 85.63% C and 14.37% H. Its molecular mass is 280 u.

What is its molecular formula?

C20H40

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