Q.
4.50×102mL−(0.0245L) can be written to correct significant figures:
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a
0.4255×102
b
4.255×102
c
42.55×102
d
4.26×102
answer is D.
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Detailed Solution
Given:(i) 4.50×102mL (ii) 0.0245L=24510000×1000mL=24.5mL=0.245×102mLSo, we have : 4.50×102mL (two decimal places)−0.245×102mL (three decimal places) =4.255×102mLSince, the result pertains to least decimal places (=2),4.255×102mL=4.26×102mLSince, the result pertains to least decimal places (=2),4.255×102mL=4.26×102mL
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