................ expressed in grams is numerically equal to gram molecular mass of the substance.

Molecular mass

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Atomic mass

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Formula mass

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A,B

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Solution

The correct option is B Molecular mass
Molecular mass expressed in grams is numerically equal to gram molecular mass of the substance.
Molecular mass of $O_{2} = 32$
Gram molecular mass of $O_{2} = 32 g$ .
Gram molecular mass is the relative molecular mass expressed in grams.

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Similar questions

Q. The relative molecular mass of a substance expressed in grams is known as _____________.

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].

There are questions also that use this formula ( similarly for gram molecule) in which we have to find the number of "gram atoms " in a given mass of substance.

So what is the real meaning of gram atom and the formula ( and is is similar for gram molecules) ?

Mass of a given substance = Number of moles $\times$ gram molecular mass of the substance.

Q. How many molecules are present in one gram molecular mass of a substance ?

Q. (a) Define gram molecular mass of a substance. How much is the gram molecular mass of oxygen?
(b) If sulphur exists as S₈ Molecules, calculate the number of moles in 100 g of sulphur. (S = 32 u)

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................ expressed in grams is numerically equal to gram molecular mass of the substance.

The correct option is B Molecular massMolecular mass expressed in grams is numerically equal to gram molecular mass of the substance.Molecular mass of O2=32 Gram molecular mass of O2=32g.Gram molecular mass is the relative molecular mass expressed in grams.

The correct option is B Molecular mass
Molecular mass expressed in grams is numerically equal to gram molecular mass of the substance.
Molecular mass of $O_{2} = 32$
Gram molecular mass of $O_{2} = 32 g$ .
Gram molecular mass is the relative molecular mass expressed in grams.