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## Main Question or Discussion Point

Hi, very quick question... It does like this: Helium in a cylinder (Which will be used to inflate a number of balloons) has a volume of (6*10

-How i solved it: Pressure * Volume = Constant so.... (6.0*10^-3)*(2.75*10^6)=V

-Mark scheme has the following answer: (0.15-(6*10

Thanks in advance.

^{-3}) cubic meters and a pressure of (2.75*10^{6})Pa. The pressure in each of the helium balloons is (1.1*10^{5})Pa, and the volume of each balloon (3*10^^{-3}) cubic meters.The temperature of helium does not change. How many balloons were inflated?-How i solved it: Pressure * Volume = Constant so.... (6.0*10^-3)*(2.75*10^6)=V

_{2}*1.1*10^5... V_{2}= 0.15m^{3}... Now what i did here was divide the total volume of helium at 1.1*10^{5}by the volume of helium in each balloon and so.....0.15/3*10^{-3}.... My answer was 50 balloons.-Mark scheme has the following answer: (0.15-(6*10

^{-3}))/3*10^{-3}... Can someone tell me where i went wrong?Thanks in advance.