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VOCAB
MASS-MOLES
MOLE-MASS
MASS-MASS
MOLE-MOLE
100
Equations must be balanced to obey this law
The conservation of mass
100

How many moles of potassium (K) atoms are in 3.04 grams of pure potassium metal?

0.0778 mol K

100

2 KClO3 ---> 2 KCl + 3 O2 1.50 mol of KClO3 decomposes. How many grams of O2 will be produced?

32.0 g/mol

100

LiOH + HBr --->LiBr + H2O If you start with 10.0 grams of lithium hydroxide, how many grams of lithium bromide will be produced?

36.3 g

100

HgO ----> Hg+O2 How many moles of mercury are produced if 24.5 moles of mercury (II) oxide decompose?

24.5 moles

200

What is the molar ratio in a chemical equation?

The ratio of mols for the reactants and products

200

2 KClO3 ---> 2 KCl + 3 O2 If 80.0 grams of O2 was produced, how many moles of KClO3 decomposed?

1.67 mol

200

2 H2 + O2 ---> 2 H2O How many grams of H2O are produced when 2.50 moles of oxygen are used?

90g/mol

200

Mg + 2 NaF--->MgF2 + 2 Na If you start with 5.5 grams of sodium fluoride, how many grams of magnesium fluoride will be produced?

4.1 g

200

4NH3+5O2 --->4NO+6H20 How many moles of oxygen are needed to react with 4.6 moles of ammonia

184 moles

300

What are the reactants

The left side of the equation

300

Given 12 g of aluminum, how many moles do you have?

0.44 mol Al

300

How many grams are 10.78 moles of Calcium (Ca)?

432.1 g Ca

300

C2H4 + 3 O2--->2 CO2 + 2 H2O If you start with 45 grams of ethylene (C2H4), how many grams of carbon dioxide will be produced?

140 g

300

2 KClO3 ---> 2 KCl + 3 O2 How many moles of O2 can be produced by letting 12.00 moles of KClO3 react?

18.00 mols

400

What is Stoichiometry?

The calculation of quantitative relationships of the reactants and products in a balanced equation

400

Given 25 g of NaCl, how many moles do you have?

0.43 mol NaCl

400

2 H2 + O2 ---> 2 H2O If 3.00 moles of H2O are produced and 48 grams of oxygen are consumed, how many grams of hydrogen gas must be used?

6.06 g

400

2 HCl + Na2SO4--->2 NaCl + H2SO4 If you start with 20 grams of hydrochloric acid, how many grams of sulfuric acid will be produced?

30 g

400

Cu + 2 AgNO3 ---> Cu(NO3)2 + 2 Ag How many moles of Cu are needed to react with 3.50 moles of AgNO3?

1.75 moles

500
What will cause the reaction to stop?
The limiting reactant
500

Given 125 g ofH2SO4, how many moles do you have?

1.27 mol H2SO

500

Given 0.345 mol of water, how many grams would you have?

6.22 g H2O

500

Pentane C5H12 reacts with oxygen gas to produce carbon dioxide and water. How many grams of carbon dioxide will be produced by the reaction of 108.0 grams of pentane?

333 g

500

4 NH3 (g) + 5 O2 (g) ---> 4 NO (g) + 6 H2O (l) When 1.20 mole of ammonia reacts, the total number of moles of products formed is:

3.00 moles