What two elements comprise most of a nebula? question 5 options: hydrogen and helium hydrogen and nitrogen oxygen and hydrogen carbon and hydrogen helium and lithium?

7.98 grams of are produced if 10.7 grams of are reacted.

Explanation:

To calculate the number of moles, we use the equation:

     .....(1)  

Putting values in equation 1, we get:

The chemical equation for the reaction is

By Stoichiometry of the reaction:

2 moles of produce = 1 mole of

So, 0.100 moles of produce= of  

Mass of =  

Hence 7.98 grams of are produced if 10.7 grams of are reacted.