Vocabulary
Stoich
Mixed Problems
Mole Hill
Balanced Equations
100
A conversion factor that relates the amounts in moles of any two substances involved in a chemical reaction.
What is mole ratio?
100

CO2 + 2LiOH --> Li2CO3 + H2O How many moles of lithium hydroxide are required to react with 20 mol of CO2?

What is 40 mol LiOH?

100

Mg + 2HCl --> MgCl2 + H2 How many grams of hydrogen will be produced if we start with 2 moles of hydrochloric acid and excess magnesium?

What is 2 g H2?

100

What is the mole mass of H2SO4 ?

What is 98.08 g

100

N2 + ____H2 --> ___ NH3

N2 + __3__H2 --> _2__ NH3

200

The value of Avagadro's number:

6.022 x 1023

200

6CO2 +6H2O --> C6H12O6 + 6O2 How many moles of carbon dioxide are needed to react with 3.25 mol of water in the reaction described above?

What is 3.25 mol CO2?

200

Mg + 2HCl --> MgCl2 + H2 What mass of hydrochloric acid (MM=36.5 g/mol) is needed to react with 2.50 moles of magnesium?

What is 182 g HCl?

200

How many atoms are in 2.34 mol of Te?

1.41 x 10 24 atoms

200

___H2O2 -->____ H2O + ___ O2

_2__H2O2 -->___2_ H2O + ___ O2

300
The reactant that determines the amounts of the other reactants that can combine--and the amount of product that can form--in a chemical reaction.
What is the limiting reactant?
300

2Mg +O2 --> 2MgO How many GRAMS of magnesium oxide are produced from 1.2 moles of magnesium?

What is 48 g

300

What is the molarity of a KCl solution if you are given 0.25 grams of KCl and 300. mL of the solution. 

0.011 M

300

Calculate the number of grams in 0.636 mol of S?

20.4 grams

300

___FeBr3 +___ H2SO4 →___Fe2(SO4)3 +___ HBr

_2__FeBr3 +__3_ H2SO4 →___Fe2(SO4)3 +_6__ HBr


400

Label the different parts of the chemical reaction:(Before the arrow, the arrow and after the arrow)

A + B --> C

A+ B: Reactants      C: Product

--> Turns Into/Yields

400

How many moles of water are produced from 36.00 grams of ammounium nitrate. 

2 NH4NO3 + 2 N2 --> 4 H2O + O2

0.8995 moles

400
Ammonia decomposes to produce nitrogen and hydrogen gases. How many moles of H2 can be formed by the decomposition of 0.145 moles of ammonia?
What is 0.218 mol H2?
400

Calculate the number of particles in 5.12 grams of C?

2.57 x 1023 particles

400

Write the complete balanced equation for the following reaction: When lithium hydroxide pellets are added to a solution of sulfuric acid, lithium sulfate and water are formed.

 2LiOH  + H2SO4  --> Li2SO4  + 2H2O 

500
States that mass is neither created nor destroyed during ordinary chemical or physical reactions. (This is why we balance chemical equations!)
What is the law of conservation of mass?
500

Hydrogen and oxygen gases react under a specific set of conditions to produce water. How many moles of oxygen would be required to produce 5.0 moles of water?

What is 2.5 mol O2?

500

Hydrogen gas reacts with oxygen gas to form H2O. Determine the limiting reactant when 5 moles of H2 reacts with 7 moles of O2.

What is H2?

500

How many grams of sodium hydroxide are required to prepare a 500 mL of 0.100 M solution? 

2 grams

500

Write the correct balanced equation: phosphorous combines with oxygen gas to produce tetraphosphorous decoxide. 

4 P + 5 O2 --> P4O10

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