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Solution Concentration Quiz

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Questions and Answers

How many moles is 18g of water?

5 moles

1 mole (correct)

2 moles

0.5 moles

How many moles is glucose if the mass is 360 grams and the molar mass is 180g/mol?

1 mole

2 moles (correct)

4 moles

0.5 moles

What is the proof of Tanduay if it has 40% alcohol?

20% proof

60% proof

40% proof

80% proof (correct)

How much NaCl should a chemist dissolve in water to make a 1L 2 molar solution?

116.88 grams Signup and view all the answers

What is the mole fraction of solute in a solution where moles of solute are 3 and total moles of solute and solvent are 10?

$\frac{3}{10}$ Signup and view all the answers

Which of the following is true about molecular weight?

It varies depending on the substance. Signup and view all the answers

What does molarity represent?

Number of moles of the solute dissolved in one liter of the solution Signup and view all the answers

What is molality?

Number of moles of solute dissolved in one kilogram of the solvent Liquid Signup and view all the answers

What does proof represent in a solution?

Two times the percentage by volume of the alcohol in the solution Signup and view all the answers

What is the unit used for parts per million (ppm)?

The number of units of mass of a contaminant per million units of total mass Signup and view all the answers

What does mass concentration represent?

$\frac{\text{mass of solute}}{\text{mass of solution}}$ Signup and view all the answers

What is the formula for mole fraction?

$\frac{\text{moles of substance}}{\text{total moles present}}$ Signup and view all the answers