A given mass of an ideal gas occupies a volume V at a temperature T and under pressure P. If the pressure is increased to 2P and the temperature is reduced to 1/2T what is the percentage change in the volume of the gas

Answer is in the photo. I couldn't attach it here, but uploaded it to a file hosting. link below! Good Luck!

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i think   the answer is c hope i'm right

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally