Problem: Determine which of the following samples contains the fewest sodium atoms.(a) 1 mol sodium oxide (b) 45 g sodium fluoride(c) 50 g sodium chloride (d) 1 mol sodium nitrate

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(a) 1 mol sodium oxide 

sodium oxide → Na2O

# of Na atoms=1 mol Na2O×2 mol Na1 mol Na2O×6.022×1023 Na atoms1 mol Na

# of Na atoms = 1.2044x1024 Na atoms


(b) 45 g sodium fluoride

sodium fluoride → NaF

molar mass NaF = 42.0 g/mol

# of Na atoms=45 g NaF×1 mol NaF42.0 g NaF×1 mol Na1 mol NaF×6.022×1023 Na atoms1 mol Na

# of Na atoms = 6.452x1023 Na atoms

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Problem Details

Determine which of the following samples contains the fewest sodium atoms.

(a) 1 mol sodium oxide 

(b) 45 g sodium fluoride

(c) 50 g sodium chloride 

(d) 1 mol sodium nitrate

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