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Chemistry Molar Concepts Quiz

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Questions and Answers

How many moles of carbon are present in 12 grams of carbon?

3 moles

1 mole (correct)

2 moles

0.5 moles

What is the molar mass of carbon dioxide (CO2)?

36 grams per mole

28 grams per mole

52 grams per mole

44 grams per mole (correct)

If 0.5 moles of a substance weigh 25 grams, what is the molar mass of the substance?

25 grams per mole

50 grams per mole (correct)

75 grams per mole

100 grams per mole

What is the concentration of a solution containing 0.25 moles of solute in 500 cm³ of solution?

0.5 M Signup and view all the answers

How many grams of potassium hydroxide (KOH) are needed to make 500 mL of a 0.2 M solution?

25 grams Signup and view all the answers

How many moles of oxygen atoms are present in 48 grams of oxygen (O2)?

3 moles Signup and view all the answers

What is the empirical formula of a compound that consists of 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen?

CH2O Signup and view all the answers

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

74.1 g/mol Signup and view all the answers

How many moles are present in 36 grams of water (H2O)?

1 mole Signup and view all the answers

What is the molar mass of sulfuric acid (H2SO4)?

98 g/mol Signup and view all the answers