Q.
The total mass of protons in 34 mg of NH3is (mass of one proton = 1.67 ×10-27kg)
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a
2×10-6kg
b
2×10-5kg
c
2×10-4kg
d
2×10-3kg
answer is B.
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Detailed Solution
no.of moles of ammonia =34×10-317=2×10-3 moles 1mole of NH3→10 moles of protons mass of 2×10-3 moles of protons =2×10-3×10×6.023×1023×1.67×10-24 =2×10-5 kg
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