Answer :
The molecular mass of reactants and products in 2H2 + O2 —> 2 H2O is 36 g/mole.
What is molecular mass?
Molecular mass can be defined as the some of the atomic masses of all the atoms in the molecule of a substance.
It is a molecule relative mass represented by atomic mass unit. It is used to those substance whose constituent particles are molecule.
The molecular mass of 2H2 + O2 —> 2 H2O can be calculated as:
= 2(1x2) + (16x2) -> 2(1x2 + 16)
= 2(2) + 32 ->2(2 + 16)
= 4 + 32 -> 36
= 36 -> 36
Therefore, the molecular mass of reactant is equal to the molecular mass of product.
Thus, the molecular mass of reactants and products in 2H2 + O2 —> 2 H2O is 36 g/mole.
To learn more about molecular mass, refer to the link below:
https://brainly.com/question/1440369
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