H₂:
M=2g/mol
m=10g
n = m/M = 10g/2g/mol = 5mol
O₂:
M = 32g/mol
m = 80g
n = m/M = 80g/32g/mol = 2,5mol
2H₂ + O₂ ⇒ 2H₂O
2mol : 1mol : 2mol
5mol : 2,5mol : 5mol
10g : 80g : 10g+80g=90g
B
<span>About a fifth of the air is made up of oxygen, and almost all the rest is nitrogen. But the origins of the relatively high nitrogen content of Earth’s air have been something of a mystery.</span>
Answer:
Yes. This reaction supports the Law of Conservation of Mass. There are the same amount of each type of atom which holds the same amount of mass. Therefore it is true that this chemical reaction supports the Law of Conservation of Mass.
Explanation:
Answer:
SI
modern form of the metric system
Explanation:
