Mass, Moles, and Particles

How many grams of silver is present in one mole?

Silver = 107.87

• 107.87 amu

• 107.87 grams

• 215.74 amu

• 215.74 grams

Tags

NGSS.HS-PS1-7

What is the molar mass of Propane (C₃H₂)?

Carbon = 12.01

Hydrogen = 1.01

• 13.03 amu

• 13.03 g/mol

• 38.05 amu

• 38.05 g/mol

How many moles are there in 15 grams of Beryllium. (molar mass of Beryllium is 9.01 g/mol)

• 135.15 moles

• 24.01 moles

• 1.66 moles

• 0.60 moles

Tags

NGSS.HS-PS1-7

19. The amount of matter can be expressed in the following ways except ___________.

• moles

• mass in grams

• volume in cubic

• number of particles

Tags

NGSS.HS-PS1-7

What is the molar mass of barium nitrate, Ba(NO₃)₂?

Barium = 137.33

Nitrogen = 14.01

Oxygen = 16.00

• 261.35 g/mol

• 213.35 g/mol

• 199.34 g/mol

• 167.34 g/mol

Which container will have lower pressure and why?

• left, it has higher volume and lower density

• right, it has higher density and lower volume

• they both have the same pressure

If container A is 10L and is under 5 atm of pressure and container B is 10L, but under 7 atm of pressure, what is true about the number of particles inside the containers?

• can not tell from the information

• they contain the same number of particles

• container A has less particles

• container B has less particles

Which box has the most pressure?

• The one to the far right, since it is the most dense and more chance of collisions

• The one to the far left, since it has more space to move and collide with the walls.

• All of them has the same pressure

Tags

NGSS.HS-PS1-3

A student inflates a balloon with helium then places it in the freezer. The student should expect

• the balloon's volume to increase

• the balloon's volume to decrease

• the balloon's moles to increase

• the balloon's moles to decrease

Tags

NGSS.HS-PS3-4

What is the molar mass of NaOH?

• 368 g/mole 

• 40 g/mole

• 57 g/mole

• 23 g/mole