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7nadin3 [17]
3 years ago
9

PLEASE HELP ME ASAP!! How many molecules are in 7.5 grams of Oxygen gas?

Chemistry
1 answer:
Juli2301 [7.4K]3 years ago
4 0
It is about 6 x 10^23. So in 5 moles of oxygen gas, which has a mass of 5x16=80 grams, there are 5x6x10^23 = 30x10^23 molecules.
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Given the reaction: A + B <--> C + D
Lady_Fox [76]

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In this expression,

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-----> uppercase letters = molarity

-----> lowercase letters = balanced equation coefficients

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K = \frac{[C]^{c} [D]^{d} }{[A]^{a} [B]^{b} }                                       <----- Equilibrium expression

K = \frac{[2 M] [2 M]}{[1 M] [1 M] }                                     <----- Insert molarities

K = \frac{4}{1  }                                                <----- Multiply

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