Unit 2: Dimensional Analysis Test Review

Make the following conversions. Give your answers in standard exponential form. Don't type unit.

25,400 mm to kilometers

Convert the following. Write your answer in standard exponential form using the correct number of significant digits. Don't include units when typing your answer.

1.56x10⁴g = ____________dg

Convert the following. Write your answer in standard exponential form using the correct number of significant digits. Don't include units when typing your answer.

432mL = ____________kL

Convert 3.5 gallons into cups. (1gal = 16cups)

• 56 cups

• 0.21875 cups

• 19.5 cups

• 48 cups

Convert 40. ounces to pounds. (16oz = 1lb)

• 2.5 pounds

• .4 pounds

• 2/5 pounds

• 5 pounds

The length of a desk is 3.50 feet. How many centimeters is the length?

(there are 2.54 cm in an inch)

• 0.115 cm

• 0.114 cm

• 106.68 cm

• 107 cm

What is the mass of 1 mole of calcium carbonate, CaCO₃?

• 99.01 g CaCO₃

• 100.09 g CaCO₃

• 216.87 g CaCO₃

• 84.09 g CaCO₃

What is the molar mass of ammonium sulfide - (NH₄)₂S?

• 68.17 g/mol (NH₄)₂S

• 40.02 g/mol (NH₄)₂S

• 114.12 g/mol (NH₄)₂S

• 82.91 g/mol (NH₄)₂S

How many moles are present in 32.3 grams of carbon dioxide (CO₂)?

• 44.01 moles CO₂

• 1421.52 moles CO₂

• 32.3 moles CO₂

• 0.734 moles CO₂

How do I calculate the molar mass of a compound?

• It is always 6.02 x 10²³

• Find the atomic mass of every element in total and add them together

• It is always 1

• Number of moles x mass