Quiz Review

What is the molarity of a 0.5L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)

• 0.8 M

• 1.5M

• 3.0M

• 6.0M

What is the molarity of 4 g of NaCl (MM=58.45) in 3,800 mL of solution?

• 0.018 M
• 0.0011 M
• 1.052 M
• 0.062 M

How many moles of NaCl are present in a solution with a molarity of 8.59M and 125 mL of solution?

• 1.07 gram
• 62.7 mol
• 1.07 mol
• 62.7 grams

How many grams of AgNO₃ are needed to prepare 0.125M solution in 250 mL of water? (the molar mass is 169.87g=1 mole)

• .03g
• 0.5g
• 5.3g
• 84.9g

Which of the following would have more mass?

• 1 mole of Li
• 1 mole of Au
• 1 mole of Si
• None, all are equal

Tags

NGSS.HS-PS1-7

How many molecules are there in 31.8 moles of water? (H₂O has a molar mass of 18.0 g/mol)

• 572 g

• 1.91 x 10²⁵ molecules

• 5.28x 10-²⁵ molecules

• 1.77 g

What is the molar mass of calcium hydroxide, Ca(OH)₂?

• 74.1 g/mole

• 57.1 g/mole

• 58.1 g/mole

• 57.1 u

Calculate the % composition by mass of oxygen present in H₂SO₄.

• 16.3%
• 65.25%
• 32.6%
• 57.14%

Calculate the number of gold atoms in a 4 mole sample of gold.

• 2.41x10²⁴
• 3.01x10²³
• 4.82x10²⁴
• 6.02x10²³

What is the volume of 5 moles of oxygen gas at STP? 

• 112 L 
• 22.4 L
• 78.8 L 
• 114.24 L