CP Chem Exam Review Part 2

Front

What is the name for P₂O₅?

Back

Diphosphorous pentoxide

Front

Determine the number of protons in the isotope Nitrogen-15.

Back

7

Front

A sample of liquid mercury has a density of 13.6 g/ml. Its mass is 14.5 grams. What is the volume of the mercury?

Back

1.07 ml

Front

The density of a piece of lead is 11.3 g/cm³. The volume was calculated through displacement to be 4.6 cm³. What is the mass for this piece of lead?

Back

52 g

Front

What is the formula for calcium nitride?

Back

Ca₃N₂

Front

Define density and provide the formula used to calculate it.

Back

Density is the mass per unit volume of a substance, calculated as Density = Mass/Volume.

Front

What is the significance of the atomic number in an element?

Back

The atomic number represents the number of protons in the nucleus of an atom, determining the element's identity.

Front

Explain the concept of isotopes.

Back

Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the formula for calculating the volume of a substance given its mass and density?

Back

Volume = Mass / Density.

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed when two or more elements chemically bond, while a mixture is a combination of two or more substances that retain their individual properties.