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yan [13]
3 years ago
15

What is the mass of 8.12 × 1023 molecules of CO2 gas? (Atomic mass of carbon = 12.011 u; oxygen = 15.999 u.)

Chemistry
1 answer:
Elza [17]3 years ago
6 0

Answer:

8306.76

Explanation:

you just calcuate 8.12 x 1023 and that will give you the answer

<h2>PLZ mark me as a BRAINLIEST</h2>
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Explanation:

It is given that volume of Pb(NO_{3})_{2} is 300 mL and molarity is 0.200 M.

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            PbCl_{2}(s) \rightleftharpoons Pb^{2+}(aq) + 2Cl^{-}(aq)

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As, molarity is number of moles present in liter of solution.

Hence, moles of Pb^{2+}(aq) will be calculated as follows.

         moles of Pb^{2+}(aq) = 0.300 L \times 0.200 M

                                                = 0.06 mol

                      [Pb^{2+}] = \frac{0.06 mol}{0.5 L}

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Mole of Cl^{-}(aq) = 0.2 L \times 0.05 M  

                                  = 0.010 M

Now,   Q = [Pb^{2+}][Cl^{-}]^{2}

                  = 0.120 \times (0.010)^{2}

                  = 1.2 \times 10^{-5}    

As, Q < K_{sp} hence, there will be no formation of PbCl_{2} precipitate.

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