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3 years ago

If an adult inhales 750 L/ H of O2 at stop how many moles of O2 does an adult inhale in a 24 hour day

Chemistry

2 answers:

leva [86]3 years ago

6 0

Answer:

803.6 moles O₂

Explanation:

At STP 1 mole any gas occupies 22.4 Liters.

=> moles of O₂ in 750 Liters = (750/22.4) moles O₂ = 33.5 moles O₂/hour

moles O₂/24 hrs = 33.5 moles/hr X 24 hr = 803.6 moles O₂

drek231 [11]3 years ago

4 0

803.6 moles, is your answer , hope this helped!!!!

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barxatty [35]

Answer:

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Ip>Ksp

Precipitation starts only when solution is supersaturated because solution become supersaturated then it does not stay in this form and precipitation starts itself only solution become saturated.

This usually happens when two solutions containing separate sources of cation and anion are mixed together and here also we are mixing lead (||)nitrate solution(source of lead(||)) into the Cl- solution.

$Ip=[Pb^{2}][2Cl^-]^2=Ksp$

$Ksp=2.4\times 10^{-4}$

lets solubility=S

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$Ksp=S \times (2S)^2$

$Ksp=4S^3$

$S=\sqrt[3]{\frac{Ksp}{4} }$

$S=3.9\times 10^{-2}$

$[Pb^{2+}]=3.9 \times 10^{-2}M$ this is the concentration required to initiate precipitation

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