f 5.0 cm\(^-3\) of 0.200 mol dm(^-3\) Na\(_2\)CO\(_3\) was diluted to 250cm(^-3\) solution, what would be the concentration of the resulting solution?
A.
0.004 mol dm(^-3\)
B.
0.020 mol dm(^-3\)
C.
0.200 mol dm(^-3\)
D.
0.400 mol dm(^-3\)
Correct answer is A
 |
= | initial molarity |
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= | initial volume in liters |
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= | final molarity |
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= | final volume in liters |
0.200 X 5.00 = M\(_2\) X 250
M\(_2\) = 1 / 250
M\(_2\) = 0.004 mol dm(^-3\)