Understanding the Law of Multiple Proportions

Who proposed the Law of Multiple Proportions?

• Dmitri Mendeleev

• Antoine Lavoisier

• Niels Bohr

• John Dalton

What does the Law of Multiple Proportions state about the masses of element B in different compounds?

• They can be expressed as a ratio of small whole numbers.

• They vary randomly.

• They are always in a 1:1 ratio.

• They are always equal.

In the example of hypothetical compounds, if the mass of element A is fixed, what can be said about the mass ratios of element B?

• They are fractions.

• They are large whole numbers.

• They are small whole numbers.

• They are irrational numbers.

In the real-world example, what is the mass of oxygen needed to combine with 1 gram of carbon to form carbon monoxide?

• 1.33 grams

• 2.67 grams

• 1.00 gram

• 3.00 grams

What is the ratio of the mass of oxygen in carbon dioxide to that in carbon monoxide when combined with a fixed mass of carbon?

• 2:1

• 3:2

• 1:2

• 1:1