how many grams of water would be produced?

Question

the equation 2NA + 2H20---------> 2NAOH + H2. IF 7.2 grams of NA undergoes reaction with water and the resulting hydrogen is burned in oxygen to produce water, how many grams of water would be produce?


don't give me the answer please explain how to do it. i have seen other but i don't get an answer the professor provided. thanks!

Answer 1

First of all, the element is Na, not NA.
Now convert 7.2 gm of Na to g-atoms (about 0.3)
The equation shows that 2 g-atom of Na form 1 mole of H2. The H2 mole will form 1 mole of water (2H2+O2=2H2O). So, by proportion, about 0.15 moles of water are formed. Hopefully, you can covert that to grams.