the percentage composition of carbon is 30.77%
Answer:
Two moles of hydrogen gas combine with one mole of oxygen gas to produce two moles of water.

Explanation:
This is the required amount of each element to synthesize water. The equation has been balanced using coefficients.
10 celceis mark brainiest
Answer :
and
Explanation:
According to Boyle's law, it states that pressure is directly proportional to the volume of the gas for a fixed amount of gas and at constant temperature.
The equation given by this law is:

where,
are initial pressure and volume.
are final pressure and volume.
Thus the correct relation for pressure and volume for a fixed amount of gas at constant temperature according to Boyle’s law is
and