It can be a compound or a single element. An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements, butcarbon, hydrogen, nitrogen and oxygen are only a few that make up the largest portion of Earth.
I would say d.
This type of energy would be called reaction energy.
Answer:
the number of neutrons in an atom of the element is 10.
Explanation:
neutron: mass # -protons
neutron: 19 (18.9984 (rounded)) - 9
neutron: 19- 9 =10
whole number is equal to the number of protons.
Answer:
1.71atm
Explanation:
The following were obtained from the question:
V1 (initial volume) = 6L
P1 (initial pressure) = 1atm
V2 (final volume) = 3.5L
P2 (final pressure) =?
Using the Boyle's law equation:
P1V1 = P2V2, the final pressure can be obtained as follow:
P1V1 = P2V2
1 x 6 = P2 x 3.5
Divide both side by 3.5
P2 = 6/3.5
P2 = 1.71atm
The final i.e the new pressure inside the piston is 1.71atm
