Midterm Review Quiz 3

What is the formula for density?

• $Density=\frac{mass}{volume}$

• $Density=mass\times volume$

• $Density=\frac{volume}{mass}$

What formula can you use to solve for mass when given volume and density?

• $mass=\frac{volume}{density}$

• $mass=\frac{density}{volume}$

• $mass=density\ \times volume$

What formula can you use to solve for volume when given mass and density?

• $volume=\frac{mass}{density}$

• $volume=\frac{density}{mass}$

• $volume=\ mass\ \times\ volume$

What is the density of the unknown object that weighs 6 grams and has a volume of 2 mL.

• 3 g/mL

• 3 mL/g

• 12 g/mL

• 12 mL/g

What is the mass of an object with a density of 12 g/mL and volume of 2 mL

• 6 g

• 6 mL

• 24 g

• 24 mL

What conversion factor do you need to use to go from grams to moles?

• Avogadro's number

• Atomic Mass

• Atomic Number

• Both Atomic Mass and Avogadro's number

What conversion factor do you need to use to go from atom to moles?

• Avogardo's number

• Atomic Mass

• Atomic Number

• Both Atomic Mass and Avogadro's number

What conversion factor do you need to use to go from atoms to grams?

• Avogadro's number

• Atomic Mass

• Both Atomic Mass and Avogadro's number

• Atomic Number

How many moles are there in 4 grams of oxygen?

• .25 mol

• 64 mol

• 12 mol

• 4 mol

How many grams are there in .5 moles of Calcium

• 20 g

• 80 g

• 10 g

• 60 g