Formula to find the percent composition of an element in a compound is

.
Now enter the variables into the formula.

%
Round to 3 significant figures. 15.897% = 15.9%
The answer is 15.9% H
Carbon dioxide emissions will grow in the next century and global temperatures will increase.
Using the table of average bond energies the delta h is the <span>the delta h lol</span>
Answer:
C. 21%oxygen
Explanation:
Dry air contains 78.09% nitrogen, 20.95%oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases.
Answer:
A. 0 N
Explanation:
One force is subtracted from the other to calculate the net force. If the opposing forces are equal, or balanced, the net force is zero.
Hope this helps!