Unit 1 Assessment

What is the molar mass of Cl₂?

• 17 g/mol

• 35.5 g/mo;

• 71.0 g/mol

• 89 g/mol

Calculate the molar mass of KOH.

• 28 g/mol

• 56 g/mol

• 84 g/mol

• 112 g/mol

Calculate the molar mass of Cu₂O.

• 37 g/mol

• 45 g/mol

• 79.5 g/mol

• 143 g/mol

Calculate the molar mass for Al(OH)₃

• 78.0 g/mol

• 72 g/mol

• 28 g/mol

• 25 g/mol

How many moles are in 117 grams of aluminum hydroxide, Al(OH)₃? Use the formula, n = m/RAM [given RAM of Al = 27; O = 16; H = 1]

• 1.5 moles

• 0.25 moles

• 78 moles

• 117 moles

Tags

NGSS.HS-PS1-7

How many moles are there in 19.5g of CaF₂? Use the formula, n = m/RAM [given RAM of Ca = 40; F = 19]

• 78 mol

• 19.5 mol

• 1521 mol

• 0.25 mol

Tags

NGSS.HS-PS1-7

How many moles of carbon atoms are there in 6g of carbon? Use the formula, n = m/RAM [given RAM of C = 12]

• 72 mol

• 18 mol

• 0.5 mol

• 6 mol

Tags

NGSS.HS-PS1-7

The number 6.02 x 10²³ is called...

• Obama's number
• Bohr's number
• Trump's number
• Avogadro's number

We use the periodic table to calculate...

• mass
• molar mass
• moles

Tags

NGSS.HS-PS1-7

What is the molar mass of C₂H₄O₂?

• 40g
• 50g
• 60g
• 68g