Calculate the gram molecular mass of water from the values of gram atomic mass of Hydrogen and of Oxygen.
Gram atomic mass of Hydrogen $= 1 g$
Gram atomic mass of Oxygen $= 16 g$

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Solution

The correct option is A 18
Gram atomic mass of Hydrogen $= 1 g$
Gram atomic mass of Oxygen $= 16 g$
The gram molecular mass of water $(H_{2} O) = 2 (1) + 16 = 18 g$

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Gram Atomic mass is just the atomic mass expressed in grams ...ie, atomic mass with gram as units. Our book says that gram atomic mass and gram atom are the same thing (similarly for gram molecule and gram molecular mass) . But later a formula is given that : Gram atom = mass in grams / Atomic mass [RAM].

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Calculate the gram molecular mass of water from the values of gram atomic mass of Hydrogen and of Oxygen.Gram atomic mass of Hydrogen =1 gGram atomic mass of Oxygen =16 g

The correct option is A 18Gram atomic mass of Hydrogen =1 gGram atomic mass of Oxygen =16 gThe gram molecular mass of water (H2O) = 2(1)+16=18 g

Calculate the gram molecular mass of water from the values of gram atomic mass of Hydrogen and of Oxygen.
Gram atomic mass of Hydrogen $= 1 g$
Gram atomic mass of Oxygen $= 16 g$

The correct option is A 18
Gram atomic mass of Hydrogen $= 1 g$
Gram atomic mass of Oxygen $= 16 g$
The gram molecular mass of water $(H_{2} O) = 2 (1) + 16 = 18 g$