moles and scientistis

What is the molar mass of PbSO₄

• 303.3 g/mol
• 294.7g/mol
• 163.8g/mol
• 372g/mol

How many moles of lead in 42g of Na (M=23)?

• 42/23
• 23/42
• 42 x 6 x 10²³

How many moles of  CO molecules in 56g of CO (M(C) = 12, M(O) =16 ?

• 2
• 28/56
• 56 x 6 x 10²³

How many moles of H in 32g of methane (CH₄).  M(CH₄) = 16

• 32/16
• 32 x 16
• 32 /16 x 4
• 32/16  x 4

What is the mass of O in 100g of CaCO₃ (M (CaCO₃ = 100)

• 1
• 100/48
• 100/16
• 3

what is the molar mass of C₆H₁₂O₆

• 154.0 g/mol

• 178.0 g/mol

• 180.0 g/mol

• 192.0 g/mol

How many moles are in 16.9g of water?

• 16.9 mol H₂O

• 305. mol H₂O

• .938 mol H₂O

• 1.06 mol H₂O

Tags

NGSS.HS-PS1-7

What is the mass of 0.89 mol of CaCl₂?

• 111 grams

• 0.008 grams

• 111.1

• 99 gram

The mass, in atomic mass units, of O₂ is?

• 16 amu
• 16 g
• 32 g
• 32 amu

The mass of one mole of O₂ is?

• 16 amu
• 16 g
• 32 g
• 32 amu

Tags

NGSS.HS-PS1-1