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Question

Chemistry Question on Nucleic Acids

The value of amu is which of the following?

A

1.5×10−24 kg1.5 \times 10^{-24} \,kg

B

1.66×10−24 kg1.66 \times 10^{-24} \,kg

C

1.99×10−23 kg1.99 \times 10^{-23} \,kg

D

1.66×10−27 kg1.66 \times 10^{-27} \,kg

Answer

1.66×10−27 kg1.66 \times 10^{-27} \,kg

Explanation

Solution

amu represents atomic mass unit. It is used in place of unified mass unit. 1amu=11 amu =1 avogram =1=1 aston =1=1 dalton 1amu=112×1 amu =\frac{1}{12} \times mass of C−12C -12 atom =112×1.9924×10−23g=\frac{1}{12} \times 1.9924 \times 10^{-23} g =1.66×10−24g=1.66×10−27kg=1.66 \times 10^{-24} g =1.66 \times 10^{-27} kg