Mass Relationships

Calculate the number of moles in 1.75 x10²⁴ formula units of NaCl.

• 1.05x10⁴⁸ mol NaCl

• 2.91 mol NaCl

• 5.81 mol NaCl

• 2.10x10⁴⁸ mol NaCl

Tags

NGSS.HS-PS1-7

The molar mass of water is 18.02 g/mol. How many moles is in 70.0 g of water?

• 3.88 mol

• 1261.4 mol

• 11.65 mol

• 1.29 mol

The density of a gas is 1.75 g/L. What is the molar mass of the gas?

• 12.80 g/mol

• 25.60 g/mol

• 19.60 g/mol

• 39.20 g/mol

Calculate the number of atoms in .750 mol of Cu.

• 24x10^-24 atoms Cu

• 49x10^-24 atoms Cu

• 4.52x10²³ atoms Cu

• 9.03x10²³ atoms Cu

What is Mass?

• measure of the amount of matter in an object

• measure of the amount of space an object takes up

• measure of the amount of force applied to an object

• measure of the amount of heat in an object

Tags

NGSS.MS-PS1-5

NGSS.MS-PS3-1

What is mass?

• The amount of matter in an object

• The amount of space an object takes up

• An object's ability to sink or float

• An object's weight

Tags

NGSS.HS-PS1-7

What is mass?

• • is a measure of the force of gravity on an object. 

• amount of space that matter occupies

• the amount of matter in an object

What is mass?

• The amount of matter in an object

• The speed of an object

• The volume of a liquid

• The color of an object

Tags

NGSS.HS-PS1-7

NGSS.HS-PS2-1

The amount of matter in an object is 

• pressure

• weight

• mass

• force

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-3

For the reaction pictured how many moles of nitrogen gas (N2) are required to produce 18 mol of ammonia (NH3)?

• 18

• 9.0

• 4.5

• 36

Tags

NGSS.HS-PS1-7