Molar Mass Assignment Answers

What is the molar mass of sodium carbonate (Na2CO3)? Your answer should be rounded to the nearest whole number. Do not include units in your answer.

106

Calculate the molar mass of CaCl2. Round to the nearest hundredth place. Do not include units in your answer.

110.98

How many moles are present in 25.0 grams of potassium permanganate, KMnO4? Your answer should be rounded to three significant figures. Do not include units in your answer.

0.158

How many moles are present in 10.0 grams of sodium hydroxide (NaOH)? Your answer should be rounded to the nearest hundredth. Do not include units in your answer.

0.25

How many moles are there in 45.0 grams of sulfuric acid, H2SO4? Your answer should be rounded to three significant figures. Do not include units in your answer.

0.459

Calculate the molar mass of iron oxide (Fe2O3). Your answer should be rounded to the nearest tenth. Do not include units in your answer.

159.6

Calculate the molar mass of aluminum nitrate, Al(NO3)3. Your answer should be rounded to the nearest whole number. Do not include units in your answer.

213

What is the mass in grams of 0.450 moles of magnesium sulfate, MgSO4? Your answer should be rounded to three significant figures. Do not include units in your answer.

54.2

The molar mass of iron is _____.

55.8 g/mol

Calculate the molar mass of sodium bicarbonate, NaHCO3. Your answer should be rounded to the nearest hundredth. Do not include units in your answer.

84.01

What is the mass in grams of 1.50 moles of sodium chloride (NaCl)? Your answer should be rounded to three significant figures. Do not include units in your answer.

87.7

Oil of vitriol is a substance that humankind has known of for thousands of years! Today the substance is known by it's scientific name sulfuric acid and has the molecular formula H2SO4. What is the molar mass of H2SO4?

98.08 g/mol