Chem 1 Lecture Review

A bar of gold has a mass of 301 g and a volume of 15.6 cm3. Calculate its density.

• 19.29 g/cm^3

• 21.55 g/cm^3

• 21.65 g/cm^3

• 19.30 g/cm^3

What is the atomic number of an element

• The number of neutrons in the nucleus

• The total number of protons and neutrons

• The number of protons in the nucleus

• The number of electrons in the outer shell

Mercury has a density of 13.6 g/mL and a volume of 5.50 mL. Calculate its mass.

• 86.9 g

• 72.7 g

• 50.6 g

• 74.8 g

The Law of Conservation of Mass states that matter can be created or destroyed during a chemical reaction

• True

• False

Tags

NGSS.MS-PS1-5

What is the density of an object with a mass of 50 g and a volume of 25 mL

• 2 g/mL

• 1 g/mL

• 25 g/mL

• 0.5 g/mL

Atoms of the same element that have different numbers of neutrons are called isotopes

• True

• False

Which group on the periodic table contains noble gases?

• 1

• 17

• 2

• 18

What is the correct formula for calcium nitrate

• CaNO3

• Ca(NO3)2

• Ca2NO3

• Ca2(NO3)3

What is the correct formula for Iron(III) chloride?

• FeCl3

• FeCl2

• Fe2Cl3

• Fe3Cl

Tags

NGSS.MS-PS1-5

Which of the following is a homogeneous mixture

• Sand & Iron fillings

• Salad

• Salt & dissolved water

• Oil & water