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Basile [38]
3 years ago
13

How many atoms are in 1.50 moles of Zinc?

Chemistry
1 answer:
Nikolay [14]3 years ago
3 0
There are 18 atoms in 1.5 moles of Zinc
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How many moles of calcium chloride are contained in a 333 gram sample?
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Answer & Explanation:

The molar mass of calcium chloride is 110.98 g/mol. We can use this information to solve this problem. We can set up our equation like this..

\frac{333 g(CaCl2)}{} *\frac{1mol(CaCl2)}{110.98g(CaCl2)}

Multiply straight across on the top and straight across on the bottom.

\frac{333}{110.98}

Now divide.

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So, there are 3.00 moles of calcium chloride contained in a 33 gram sample which is answer choice D.

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Find the value of the solubility product ksp for a saturated solution of mercury bromide, hgbr2, using the solubility of mercury
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When the reaction equation is:

HgBr2(s) ↔ Hg2+(aq)   +   2Br-(aq)

So Ksp expression = [Hg2+] [Br-]^2

assume the solubility S = X = 2.66 x 10^-7 M 

and from the reaction equation :

we can see that [Hg2+] = X

and the [Br-] = 2 X

so by substitution in Ksp formula will can get the Ksp value:

∴ Ksp = X * (2X)^2

       = 2.66 x 10^-7 * (2*2.66 x 10^-7)^2

       = 7.53 x 10^-20
7 0
3 years ago
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