Molar mass & counting atoms

What is Avogadro's number?

• 6.02 x 10²³

• 1 mole

• 600 million

• 6.02

Tags

NGSS.HS-PS1-7

How many moles is 6.02 x 10²³ molecules of H₂O?

• 1 mole

• 2 moles

• 6.02 moles

• 602000000000000000000000 moles

Tags

NGSS.HS-PS1-7

How do we calculate the molar mass of H₂O?

• 2+16=18
• 1+16=17
• 2+32=34
• 1+31=32

What is the molar mass of CO₂?

• 12 g/mol

• 16 g/mol

• 32 g/mol

• 44 g/mol

Find the molar mass of KCl

• 36 g/mol
• 78 g/mol
• 74 g/mol
• 178 g/mol

Find the molar masses of the following compounds:

(NH₄)₂CO₃

• 303.3 g/mole

• 102.9 g/mole

• 74.1 g/mole

• 160.0 g/mole

• 96.0 g/mole

Find the molar masses of the following compound

C₆H₁₂O₆

• 303.3 g/mole

• 102.9 g/mole

• 180.0 g/mol

• 160.0 g/mole

• 96.0 g/mole

What is the mass of one mole of (He) Helium?

• 4 g

• 2 g

• 8 g

• There is no way to know

C₃H₅(NO₃)₃

• C = 3, H = 5, N = 3, O = 9

• C = 3, H = 5, N = 1, O = 9

• C = 9, H = 15, N = 3, O = 9

• C = 9, H = 15, N = 1, O = 3

H₂SO₄

• H = 2, S = 4, O = 4

• H = 2, S = 1, O = 4

• H = 8, S = 4, O = 4

• H = 2, SO = 4

Tags

NGSS.MS-PS1-1