the number of neutrons in 5g of D2O(D is deuterium) are
a.0.25 Na b. 2.5 Na c. 1.1 Na d. None of these
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The mass of one deuterium atom is 2 (1 p + 1n)
So, 20 gm of D2O = molar mass = 6.022 x 1023D2O molecules
So, 5 gm of D2O will have = 1.5 x 1023 D2O molecules
Since, one molecule contains two neutrons
So, total no. of neutrons in the given sample = 2 x 1.5 x 1023 = 3 x 1023
So, 20 gm of D2O = molar mass = 6.022 x 1023D2O molecules
So, 5 gm of D2O will have = 1.5 x 1023 D2O molecules
Since, one molecule contains two neutrons
So, total no. of neutrons in the given sample = 2 x 1.5 x 1023 = 3 x 1023
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