CH07A In Class Test Review

To convert from moles to grams, you should multiply by ....

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To convert from grams to moles, you should multiply by ....

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0.50 moles of carbon (C) is equal to how many grams?

• 6.0 grams

• 12.0 grams

• 8.0 grams

• 14.0 grams

36 g of beryllium (Be) contains how many moles?

• 0.25 mol

• 4.0 mol

• 45 mol

• 320 mol

What is the mass of 2.50 mol of oxygen gas (O₂)?

• 40.0 g

• 80.0 g

• 16.0 g

• 32.0 g

Compound XY has a molar mass of 10.0 g/mol.

How many moles are in a 4.00 g sample of XY?

(3 significant figures, include units)

Compound XY has a molar mass of 10.0 g/mol.

How many moles are in a 2.44 g sample of XY?

(3 significant figures, include units)

Compound XY has a molar mass of 10.0 g/mol.

What is the mass of a 2.00 mol sample of XY?

(3 significant figures, include units)

Compound XY has a molar mass of 10.0 g/mol.

What is the mass of a 8.00 mol sample of XY?

(3 significant figures, include units)

What is the correct dimensional analysis for calculating the mass of 4.32 mol O₂?