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How many moles of Na^(+) ions are in 20m...

How many moles of `Na^(+)` ions are in 20mL of `0.4 M Na_(3)PO_(4)`?

A

0.008

B

0.024

C

0.05

D

0.2

Text Solution

Verified by Experts

The correct Answer is:
B
No. of moles of `Na_(3)PO_(4)=(MV)/(1000)=(0.4xx20)/(1000)`
=0.008
Number of moles of `Na^(+)=3xx` Number of moles of `Na_(3)PO_(4)`.
`=3xx0.008=0.024`.
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