Given that the atomic weight of hydrogen is appoximately 1 gram per mole, use the method above to estimate teh average molecular mass for water vapor

Answer : The average molecular mass of water vapor is, 18 g/mol

Explanation :

Molar mass : It is defined as the sum of the mass of all the atoms each multiplied its atomic masses that are present in the molecular formula of a compound. It is expressed in g/mol.

As we know that,

Atomic weight of hydrogen = 1 g/mole

Atomic weight of oxygen = 16 g/mole

Now we have to calculate the average molecular mass of .

Average molecular mass of =

Therefore, the average molecular mass of water vapor is, 18 g/mol

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)