SACE Stage 1 Chemistry - 4.3 Quantities in Reactions (Part 1)

What is the formula for mass concentration?

• Mass x Volume

• Mass / Volume

• Volume / Mass

• Mass + Volume

A saline solution contains 0.90 g of NaCl per 100.0 mL of solution. What is its mass concentration in grams per litre?

• 0.009 g/L

• 0.90 g/L

• 9.0 g/L

• 90.0 g/L

What are the standard units for molar concentration?

• grams per liter (g/L)

• moles per liter (mol/L)

• grams per mole (g/mol)

• liters per mole (L/mol)

What does "Percent weight per volume (%w/v)" represent?

• Mass of a solute, in grams, in 100 mL of solution.

• Volume of a solute, in mL, in 100 mL of solution.

• Mass of a solute, in grams, in 100 g of solution.

• Mass of a solute, in milligrams, in 1 kilogram of solution.

What is the primary unit used to measure "Parts per million (ppm)"?

• grams per liter (g/L)

• milligrams per litre (mg/L)

• micrograms per litre (µg/L)

• moles per litre (mol/L)

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