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scoundrel [369]
3 years ago
5

How many moles of O2 are in 53 L of O2 at STP? A) 2.4 B) 0.45 C) 1.65 D) 1187

Chemistry
1 answer:
Zolol [24]3 years ago
5 0
For Any gas:
P V = n R T
where:
P : pressure
V : volume
n : number of moles
R : gas constant
T : absolute temperature in kelvin
provided that:
V = 53 L
S.T.P means standard temperature and pressure at which pressure is 1 atm and temperature is 273 K 
R = 0.08205 atm.L /mol.K
So:
n = \frac{P.V}{R.T} = \frac{1atm  * 53 L}{0.08205 * 273 K}
= 2.4 moles
The correct answer is A) 2.4
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Answer:

1) 1.15 mol

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1)

550 mL= 0.55 L

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mol solute= M * L solution

mol solute= (2.1 M * 0.55 L )        M=1.15 mol solute

2)

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8 0
3 years ago
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Again 105.8 has good difference from the second reading hence again this is not precised

However the last reading 104.6 is quite near to 105.8 so 104.6 can be called as precise


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