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2 years ago

Which of the following could be an empirical formula? a C6H12O6 b H2O2 c CH2O d C6H6

Chemistry

2 answers:

Crank2 years ago

5 0

Answer:

A C6H12O6 will be the empirical formulae.

AfilCa [17]2 years ago

4 0

I dont know i just want help thats why im answering to get 1 help as i have to help to get help

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Answer:

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Explanation:

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GuDViN [60]

PLEASE HELP I HAVE TO DO THIS BENCHAMRK QUESTION!!!

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2 years ago

Calculate the molar solubility of CaF2 at 25°C in a solution that is 0.010 M in Ca(NO3)2. The Ksp for CaF2 is 3.9 x 10-11.

madreJ [45]

Answer:

$Molar \ solubility=3.12x10^{-5}M$

Explanation:

Hello,

In this case, for the dissociation of calcium fluoride:

$CaF_2(s)\rightleftharpoons Ca^{2+}+2F^-$

The equilibrium expression is:

$Ksp=[Ca^{2+}][F^-]^2$

In such a way, via the ICE procedure, including an initial concentration of calcium of 0.01 M (due to the calcium nitrate solution), the reaction extent $x$ is computed as follows:

$3.9x10^{-11}=(0.01+x)(2*x)^2\\\\x=0.0000312M$

Thus, the molar solubility equals the reaction extent $x$ , therefore:

$Molar \ solubility=3.12x10^{-5}M$

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