A container with a fixed amount of gas is at a volume of 121 mL and a pressure of 0.892 atm. If the volume is increased to 221 mL then what will the new pressure be?

pie chart because it is in percents ( % )

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

it is b that is the answer.