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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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treebushafro treebushafro
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A month ago
A 27.6ml sample of PH3 used in the manufacture of a flame retardant chemicals is obtained at stp.                               a)what is the mass of this gas in mg? b) how many molecules of PH3 are present ? How many atoms are present all together
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snowmobile45snowmobile45
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A month ago
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?

a) The mass of the gas in mg is 27.6 x 0.08988 = 2.48 mg.

b) There are 2.48 x 6.022 x 10^23 molecules of PH3 present, and 6.022 x 10^23 atoms of PH3 present all together.
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