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Balancing Equations
Stoichiometry
Molar Mass
Conversions
Vocabulary and Units
100

___ H2    +  ___  O2    →   ___ H2O

What is 

2 H2    +    O2    →   2 H2O ?

100

3 Mg + N2 → Mg3N2

How many grams of N2 were consumed, if 6.1 grams of Mg3N2 are produced?

What is 1.69 grams if N2?


6.1 grams * (1mol)/(100.95g) * (1mol)/(1 mol) * (28.02 g)/(1 mol) = 1.69g

100

Molar Mass of C2H7N

What is 45.10 grams?


2(12.01) + 7(1.01) + 14.01 = 45.10

100

Mass of 2.54 mol of Zn

What is 166 g of Zn?

2.54 mol * (65.38g)/(1mol) = 166.0654 g

100


Unit for Molar Mass

What is grams per mol (g/mol)?

200

__ CH4 + __ O2  → ___ CO2 + __ H2O

What is CH4 + 2 O2  → CO2 + 2 H2O 

200

Ca(ClO3)2 → CaCl2 + 3 O2

If 43.85 grams of O2 are produced, how many grams of CaCl2 will also be produced?

What is 79.93 grams of CaCl2?

43.85g * (1 mol)/(32.0g) * (1 mol)/(3 mol) * (174.99g)/(1 mol) = 79.93g

200

Molar mass of NiCO3

What is 118.70 grams?


58.69+12.01 +3(16.00)= 118.70g

200

Moles of NH3 atoms in 99.4 g of NH3

What is 5.84 mol of NH3?


99.4 g * (1 mol)/(17.031g) = 5.836570

200

6.022 * 1023

What is Avogadro's Number?

300

__ CH3OH + __ O2 → __ CO2 + __ H2O

2 CH3OH + 3 O2 → 2 CO2 + 4 H2O

300

2 C4H10 + 13 O2  → 8 CO2 + 10 H2O


How many grams of H2O are produced when 5.38g of O2 is reacted?

What is 2.33 g of H2O ?


5.38g * (1mol)/(32.00g)*(10mol)/(13mol)* (18.02g)/(1mol) = 2.33g

300

Molar Mass of Na2B4O7 * 10 H2O (Borax)

What is 381.42 g/mol?


2(22.99g) + 4(10.81g) +17(16.00)g + 20(1.01g) = 381.42

300

Mass of 6.74 moles of Hg atoms

What is 1350 grams of Hg? 

6.74 mol * (200.59 grams) / (1 mol) = 1351.97 grams

300

Numbers in front of the chemical formulas 

What are Coefficients?

400

___ CO + ___ H2  → ___ C8H18 + ___ H2O

What is 

8 CO + 17 H2   →  C8H18 + 8 H2O

400

2 KClO3  → 2 KCl + 3 O2

How many grams of O2 will be formed from 3.76 grams of KClO3?

What is 1.47g of O2 ?

3.76 g * (1 mol)/(122.55g)* (3mol)/(2mol)* (32g)/(1mol)= 1.47 g 

400

Molar Mass of C18H36O2

What is 284.54 grams per mol (g/mol)?


18(12.01g) + 36(1.01g) +2(16.00g) = 284.54 g/mol

400

Mole of Sn atoms in 557.2 grams of Sn

What is 4.694 moles of Sn?


 

557.2 g * (1 mol)/(118.71 g) = 4.694 mol

400

Substances formed by a chemical reaction

What are Products?

500

___ Ca3(PO4)2  +  ____ NaOH  →  ____ Na3PO4  +   _____ Ca(OH)2

What is 

Ca3(PO4)2  +  6 NaOH  →  2 Na3PO4  +   3 Ca(OH)2 ?

500

NaI + Cl2 → NaCl + I2 


What mass of sodium chloride is produced when chlorine gas reacts with 0.29 grams of sodium iodide?

What is 0.11 g of NaCl?


0.29 g * (1 mol)/(149.89g) * (2 mol)/(2 mol) * (58.44g)/(1 mol)= 0.11299g

500

The mass of 1 mole of Rh atoms

What is 102.91 g/mol?

500

Moles of Al atoms in 37.2 g of Al

What is 1.38 mol of Al?

37.2 g * (1mol)/(26.98g) = 1.378799 mol

500

Mass in grams of one mole of of a substance

What is Molar Mass?