Moles/Volume/Percent

What is the mole used for? 

• To measure the amount of grams in a substance
• To measure the amount of atoms or molecules in a substance
• To measure the amount of energy in a substance
• To measure the amount of bonding in a substance 

What is Avogadro's Number? 

• 6.02 x 10²³
• - 6.02 10²³
• 6.02 x 10²²
• 6,020,000,000,000

Tags

NGSS.HS-PS1-7

Calculating percent composition determines the ___________ of each atom in a compound

• percent by mass
• percent by volume
• percent by number

Where do you look to calculate the molar mass?

• avogadros number
• periodic table 

Tags

NGSS.HS-PS1-1

What is the molar mass of Carbon Dioxide (CO₂)?

• 12 amu
• 12 g
• 44 g
• 44 amu

What is the molecular formula if the empirical formula is C₂H₅ and the molecular molar mass is 58.14 g/mol?

• C₂H₅
• C₄H₁₀
• C₁H_2.5
• C₄H₈

Find the percent composition of N₂S₂.

• N: 69.6%  S: 30.4%
• N:36% S: 75.6%
• N: 96.6% S: 3.4%
• N: 30.4% S: 69.6%

Tags

NGSS.HS-PS1-7

Find the percent composition of Mg in Mg₃(PO₄)₂.
   

• 27.75% Mg
• 23.57% Mg
• 48.68% Mg
• 13.45% Mg

What is the mass of one mole of Al₂(SO₄)₃?

• 75.04 g
• 342.14 g 
• 75.04 mol
• 342.14 mol

How many moles of carbon atoms are there in 5g of carbon?

• 60 mol
• 17 mol
• 0.42 mol
• 7 mol