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Orlov [11]
2 years ago
13

True or false silica is the most abundant compound found in magma.

Chemistry
1 answer:
Burka [1]2 years ago
3 0
 your answer is true because it is found iin the magma
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What are the rows of the periodic table called?
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A solution of NaCl ( aq ) is added slowly to a solution of lead nitrate, Pb ( NO 3 ) 2 ( aq ) , until no further precipitation o
statuscvo [17]

Answer : The molarity of Pb(NO_3)_2  solution is, 0.352 M

Explanation :

First we have to calculate the moles of PbCl_2

\text{Moles of }PbCl_2=\frac{\text{Given mass }PbCl_2}{\text{Molar mass }PbCl_2}

Molar mass of PbCl_2 = 278.1 g/mol

\text{Moles of }PbCl_2=\frac{19.58g}{278.1g/mol}=0.07041mol

Now we have to calculate the moles of CaCl_2

The balanced chemical equation is:

Pb(NO_3)_2(aq)+2NaCl(aq)\rightarrow PbCl_2(s)+2NaNO_3(aq)

From the balanced reaction we conclude that

As, 1 mole of PbCl_2 produced from 1 mole of Pb(NO_3)_2

So, 0.07041 mole of PbCl_2 produced from 0.07041 mole of Pb(NO_3)_2

Now we have to calculate the molarity of Pb(NO_3)_2

\text{Molarity of }Pb(NO_3)_2=\frac{\text{Moles of }Pb(NO_3)_2}{\text{Volume of solution in (L)}}

\text{Molarity of }Pb(NO_3)_2=\frac{0.07041mol}{0.200L}=0.352M

Therefore, the molarity of Pb(NO_3)_2  solution is, 0.352 M

4 0
3 years ago
Please help me with my 8th grade chemistry, I'm really confused
saveliy_v [14]

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Explanation:

7 0
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