Which of the following pairs of molecules have practically the same mass? (a) \( \mathrm{H}_{2} ...

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Which of the following pairs of molecules have practically the same mass?
(a) \( \mathrm{H}_{2} \mathrm{O} \) and \( \mathrm{D}_{2} \mathrm{O} \)
(b) \( \mathrm{H}_{2} \mathrm{O} \) and HTO
(c) \( \mathrm{D}_{2} \mathrm{O} \) and HTO
(d) DTO and HDO
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