Chemistry Final Review Part 3

Where are the numbers for a mole ratio found?

• Coefficients

• Subscripts

• In between elements

• After a compound

Tags

NGSS.HS-PS1-7

What is the mole ratio of Ba(OH)2 to AlPO4? Balance the equation, if needed.

AlPO4 + Ba(OH) 2 -> Al(OH)3 + Ba3(PO4)2

• 2,3,2,1

• 1,2,3,2

• 1,2,3,4

• 1,1,1,1

What is the mole ratio of Mg to MgCl2? Balance the equation, if needed.

Mg(s) + HCl(aq) -> MgCl2(aq) + H2(g)

• 1,1,1,1

• 1,2,1,1

• 2,1,2,1

• 1,2,1,2

N2 + 3H2 -> 2NH3

What is the mole ratio between Nitrogen and Ammonium in the above reaction?

• 1:2

• 2:3

• 3:2

• 1:3

Tags

NGSS.HS-PS1-7

2C2H6 + 7O2 -> CO2 + 6H2O

Ethane (C2H6) combusts in the above reaction. What is the mole ratio of ethane to oxygen gas?

• 2:7

• 7:1

• 1:6

• 2:6

2KClO3 -> 2KCl + 3O2

How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?

• 10.05 mol O2

• 3 mol O2

• 2 mol O2

• 6.7 mol KClO3

Tags

NGSS.HS-PS1-7

2Na + 2H2O -> 2NaOH + H2

How many grams of hydrogen are produced if 120 g of Na are available?

• 5.27 g H2

• 6.32 g H2

• 1.01 g H2

• 22.99 g H2

CH4 + 2O2 -> CO2 + 2H2O

How many moles of carbon dioxide are produced from the combustion of 110 g of CH4?

• 6.86 mol CO2

• 10 mol CO2

• 3.32 mol CO2

• 22.59 mol CO2

How many particles are in 13.5 grams of Beryllium?

• 9 x 10^23 particles

• 6 x 10^23 particles

• 1.5 particles

• 9 particles

What is the molar mass of NaOH?

• 40 g/mol

• 40 g

• 40 mol

• 40 M