Stoichiometry
The density of a gas 'X' is twice that of another gas 'Y'. If the molecular weight of gas 'Y' is 'M'; then the molecular weight of the gas 'X' will be

M/2
M
M/4
2M

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Stoichiometry
Heat of reaction is not influenced by

None of these
The route/method through which final products are obtained
Whether the reaction is carried out at constant temperature or constant pressure
The physical state (e.g., solid, liquid or gaseous) of reactants and products

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