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Answer :

a) Concentration of sodium carbonate

Concentration (M) = # mol/ vol (L)

List known data

# mol: 0.50 mol Na2CO3

Vol: 1.0 dm3

List unknown data

M

Converting dm3 into L

[tex]L=1.0dm^3\cdot\frac{1L}{1.0dm_3}=1.0L[/tex]

Molarity

[tex]M=\frac{0.50molNa_2CO_3}{1.0L}=0.50molNa_2CO_3_{}[/tex]

The molarity of Na2CO3 is 0.50 M

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