Law of Multiple Proportions and More

The percentage of copper and oxygen in samples of “CuO” obtained by different methods were found to be the same. This illustrates the law of:

• Definite proportions

• Conservation of mass

• Multiple proportions

• Reciprocal proportions

Name of the scientist who discovered the Law of Multiple Proportions:

• J.J.Thomson

• John Dalton

• Joseph Louis Proust

• Antoine Lavoisier

Tags

NGSS.MS-PS1-5

The opposite of the Law of Multiple Proportions is the Law of Definite Proportions.

• True

• False

What is the ratio of C:O in CO₂?

• 1:2

• 3:7

• 8:4

• 2:4

Tags

NGSS.MS-PS1-1

The ratio of the elements that make up water from different sources are not always the same.

• True

• False

Tags

NGSS.HS-ESS2-5

H₂O and H₂O₂ have different chemical properties. This is an example of the Law of:

• Conservation of Mass.

• Motion.

• Average Atomic Mass.

• Multiple Proportions.

Tags

NGSS.MS-PS1-1

An object is shiny, a good conductor, solid at room temperature, bendable, and silver in color. The material is probably a:

• metal

• metalloid or semiconductor

• nonmetal

Tags

NGSS.MS-PS1-1

Hydrogen is a:

• metal

• metalloid or semiconductor

• nonmetal

Tags

NGSS.HS-PS1-1

A compound made of a metal and a nonmetal is known as a:

• gas

• salt

• metalloid

• molecule

Tags

NGSS.MS-PS1-1

In H₂O, the H and O are known as:

• chemical symbols

• subscripts

• chemical formulas