Chemical Math (Stoichiometry)

What type of reaction is represented 2H2  + O2 = 2H2O?

• Decomposition
• Combustion
• Synthesis
• Neutralization

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of reaction produces carbon dioxide and water?

• Neutralization
• Synthesis
• Decomposition
• Combustion

What is the name of the following reactants?

• hydrogen chloride plus sodium hydroxide.
• hydrochloric acid plus sodium hydroxide.
• dihydrogen monoxide plus sodium hydroxide.
• dihydrogen monoxide plus sodium chloride.

What are the correct coefficients to balance the equation?

• 1, 1, 1, 1
• 1, 2, 1, 2
• 2, 1, 2, 1
• 2, 3, 2, 4

Tags

NGSS.HS-PS1-7

What is the mole to mole ratio of propane to carbon dioxide in the equation?

• 1:3
• 1:5
• 1:4
• 1:1

Tags

NGSS.HS-PS1-7

What is the conversion factor from mol to particles?

• 2018
• 6.02 x 10^23 
• 22.4 
• molar mass

What is the molar mass of iron (III) oxide?

• 72 g
• 200 g/mol
• 104 g/mol
• 160 g/mol

Tags

NGSS.HS-PS1-7

How many moles of gas are in 56 L at standard temperature and pressure (STP)?

• 1.5 mol
• 2.0 mol
• 2.5 mol
• 2.25 mol

What is the number of molecules in 0.50 moles of Nitrogen gas?

• 3.01 x 10^23 molecules
• 6.02 x 10^23 molecules
• 1.20 x 10^24 molecules
• 4.214 x 10^23 molecules

What is the molar mass of C₆H₁₂O₆?

• 180.18
• 180.12
• 180.24
• 180.06