B. Molar Mass (Worksheet Make-Up)

B. Molar Mass (Worksheet Make-Up)

Molar Mass is the mass measured in grams of each element or compound if you had... 602,200,000,000,000,000,000,000 of them. That big number is called a mole. We use it like we use the word, Dozen for 12 or Couple for 2.

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Multiple Choice

What is the mass of 1 mole of calcium carbonate, CaCO₃?

• 99.01 g

• 100.09 g

• 216.87 g

• 84.09 g

Multiple Choice

Which has more moles?

• 10.81 grams of boron (B)

• 26.98 grams of aluminum (Al)

• they have the same moles

• there is no way to tell

Multiple Choice

How many molecules are in 1 mole?

• 1

• 12

• 6.02 x 10²³

• 6.23 x 10⁶

Multiple Choice

Which has a greater mass: 1 mole of sodium (Na) or 2 moles of lithium (Li)?

• 1 mole of sodium

• 2 moles of lithium

• neither

• more information is needed.

Multiple Choice

Which compound below has the smallest molar mass?

• CO

• CO₂

• H₂O

• H₂O₂

Multiple Choice

How many particles are in a mole?

• 602
• 602 million
• 602 moles
• 6.02 x 10²³

Multiple Choice

What is the molar mass of CO₂?

• 12
• 16
• 32
• 44

Multiple Choice

What is the mass of one mole of aluminum chloride (remember to determine the correct formula first)?

• 62.435g
• 116.399g
• 133.341g
• 97.888g

Multiple Choice

What is the molar mass of NaOH?

• 40 g/mol
• 38.989 g/mol
• 23.998 g/mol
• 57.004 g/mol

Multiple Choice

What is the molar mass of table salt (NaCl)?

• 116.886 g/mol
• 35.453 g/mol
• 22.990 g/mol
• 58.443 g/mol

Multiple Choice

What is the mass of one mole of aluminum?

• 27 g
• 13 g
• 54 g
• 14 g

Multiple Choice

What is the molar mass of fluorine gas?
(beware!)

• 18.998 g/mol
• 38 g/mol
• 9 g/mol
• 18 g/mol

Multiple Choice

What is the molar mass of sodium?

• 11
• 23
• 45.98
• 3

Multiple Choice

The mass of one mole of substance is called...

• molecular mass
• mole constant
• molar mass
• atomic weight

Multiple Choice

The molar mass of an element is equal to its...

• Atomic mass
• Atomic number
• Oxidation number
• Valence electrons

Multiple Choice

Calculate the molar mass of Mg(OH)_2.

• 33.2 g/mol
• 41.3 g/mol
• 86.9 g/mol
• 58.3 g/mol

Multiple Choice

Which has a greater mass: 1 mole of scandium or 2 moles of boron?

• scandium
• boron
• neither
• more information is needed.

Multiple Choice

Calculate the molar mass of NH₄NO₂

• 50 g/mol

• 60 g/mol

• 64 g/mol

• 78 g/mol

Multiple Choice

Calculate the molar mass for Al(OH)₃

• 78.0 g/mol

• 72 g/mol

• 28 g/mol

• 25 g/mol

Multiple Choice

Calculate the molar mass for Al(OH)₃

• 78.0 g/mol

• 72 g/mol

• 28 g/mol

• 25 g/mol

Multiple Choice

What is the molar mass of B₂(CO₃)₃?

• 81.632 g/mol
• 94.842 g/mol
• 38.822 g/mol
• 201.648 g/mol

Multiple Choice

Calculate the molar mass for Al(OH)₃

• 78.0 g/mol

• 72 g/mol

• 28 g/mol

• 25 g/mol