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Vladimir79 [104]
4 years ago
9

Approximately how much greater in mass is a d2o molecule than an h2o molecule? (assume the oxygen atoms have a mass number of 16

. deuterium, d, is an isotope of hydrogen with a mass number of 2, 2h.)
Chemistry
2 answers:
faust18 [17]4 years ago
6 0

The deuteriuoted water that is D_{2}O consists of an isotope of hydrogen in place of hydrogen from the normal water. The approximate mass of deuteriuoted water and normal water can be calculated as {(2×2)+16} = 20. However the exact mass of D_{2}O is 20.027 g/mole, whereas the mass of water can also be calculated as- {(1×2)+16}=18, however the exact mass of (H_{2}O) molecule is 18.015 g/mole. Thus the difference between the mass of the molecules are (20.027 - 18.015) = 2.01 2g/mole.

7nadin3 [17]4 years ago
3 0

Answer:

D_2O molecule is greater than H_2O molecule by 2 amu.

Explanation:

Mass of H_2O molecule:

M_{H_2O}= 2 × 1 amu + 1 × 16 amu = 18 amu

Mass of D_2O molecule:

M_{D_2O}= 2 × 2 amu + 1 × 16 amu = 20 amu

Difference between mass of D_2O \& H_2O

M_{D_2O}-M_{H_2O} =20 amu - 18 amu = 2 amu

M_{D_2O} =2+M_{H_2O}

D_2O molecule is greater than H_2O molecule by 2 amu.

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