G10 Chemistry Revision

In a _________solution, there are few solute particles in the solvent.

• Concentrated

• Dilute

• Heterogeneous

• None of the above

The relative amount of the elements in the compound is expressed as the ______

• Percent composition

• Density

• Volume

• Mass

Calculate the grams of nitrogen in 200 g of NH4NO3

Note: there is 35% N in the compound.

• 40g

• 50g

• 60g

• 70g

_________ states that a compound contains its component elements in a fixed ratio by mass.

• Law of definite proportion

• Law of constant composition

• Newton’s law

• Dalton’s law

What is the percent by mass of nitrogen in NH₃?

• 1.21% N

• 23.8% N

• 82.4% N

• 11% N

________ of a solution is the ratio of the volumes of solute to solution.

• Percent by mass

• Percent by volume

• Percent by number of moles

• None of the above

A stock solution is a concentrated solution of known molarity that is diluted to make ______concentrated solutions.

• more

• less

• well-balanced

• None of the abov

What is the molecular formula of a compound with the empirical formula C₄H₆O and a molar mass of 280 g/mol?

• C₄H₆O

• C₈H₁₂O2

• C₁₂H₁₈O₃

• C₁₆H₂₄O₄

A solution has a volume of 150 mL and contains 0.70 mol NaCl. What is its molarity?

• 3 M

• 3.5 M

• 4 M

• 4.7 M

The _____________ of a compound gives the lowest whole number ratio of the atoms or moles of elements in a compound

• molecular formula

• formula unit

• empirical formula

• All of the above