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Volgvan
3 years ago
13

For each store,what is the ratio of the number of cans to the price:24 packs (2 for 9);12 packs (4 for 10);12 packs (3 for 9)

Chemistry
1 answer:
adelina 88 [10]3 years ago
3 0
$4.50 for the 24 pack, $2.50 for the 4 for 10, 12 pack and for the last one it is $3.00
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What is the ph of 0.450 m al(no3)3 [ka for al3+(aq) = 1.00x10-5]? express your answer to two decimal places?
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Answer : The pH of the solution is, 2.67

Explanation :

The equilibrium chemical reaction is:

                           Al^{3+}+H_2O\rightarrow Al(OH)^{2+}+H^+

Initial conc.       0.450                   0               0

At eqm.           (0.450-x)                 x               x

As we are given:

K_a=1.00\times 10^{-5}

The expression for equilibrium constant is:

K_a=\frac{(x)\times (x)}{(0.450-x)}

Now put all the given values in this expression, we get:

1.00\times 10^{-5}=\frac{(x)\times (x)}{(0.450-x)}

x=0.00212M

The concentration of H^+ = x = 0.00212 M

Now we have to calculate the pH of solution.

pH=-\log [H^+]

pH=-\log (0.00212)

pH=2.67

Therefore, the pH of the solution is, 2.67

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3 years ago
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What was the initial temperature of a gas contained in a 2.0-L bottle at a pressure of 1.00 atm if it was placed under vacuum an
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If you breathe fast, CO2 is If you breathe fast, C O 2 is blank and the equilibrium shifts to blank [ H 3 O + ], which raises th
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If You Breathe Fast, CO2 Is Blank The Equilibrium Shifts To Blank [H3O+], Which Raises The PH.

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