4.00g of solid sodium hydroxide is added to water to make a solution with a concentration of
0.200 mol/dm
What is the volume of water used?
A 0.5 cm
B 20 cm
C 500 cm
D 2000 cm
Answers
Answered by
3
Answer:
C
Explanation:
concentration of NaOH in mol/dm^3 = concentration of NaOH in g/dm^3/ molar mass of NaOH
Mr of NaOH= 23+ 16+ 1 = 40
M= 40g/ mol
0.2mol= concentration of NaOH in g/dm^3/ 40g/mol
= 0,2mol/dm^3 x 40g/ mol
= 8g/dm^3
1dm^3= 1000cm^3
4.00g of NaOH will be dissolved in 4g x 1000cm^3/ 8g
=500cm^3 of water
Answered by
1
Answer:
C. 500 cm
Explanation:
concentration of NaOH in mol/dm^3 = concentration of NaOH in g/dm^3/ molar mass of NaOH
Mr of NaOH= 23+ 16+ 1 = 40
M= 40g/ mol
0.2mol= concentration of NaOH in g/dm^3/ 40g/mol
= 0,2mol/dm^3 x 40g/ mol
= 8g/dm^3
1dm^3= 1000cm^3
4.00g of NaOH will be dissolved in 4g x 1000cm^3/ 8g
=500cm^3 of water
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