C because it has to do with opposite motions and stuff
Hey there!
The molar mass of nitrogen is 14.007.
Convert grams to moles:
21.2 ÷ 14.007 = 1.51
The sample containing 21.2g of nitrogen contains 1.51 moles of nitrogen.
Hope this helps!
Answer:
The answer is combustion.
Hydrogen as it has only 1 proton and therefore only an atomic mass of 1...
