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Gnesinka [82]
3 years ago
13

Can anyone help me with 6-10 ? I’ll mark as a brainliest.

Chemistry
2 answers:
Ivanshal [37]3 years ago
7 0

Answer:

based on this ball and stick model how many oxygen atoms are there in a milecule of 2 propanol

Explanation:

algol133 years ago
7 0
Do you understand it though
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What type of element is most abundant: metals, nonmetals, or metalloids?
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Which of the following units are commonly used in chemistry? A Kelvin b ampere c fluid ounce d kilogram ​
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A solid powder is known to be a mixture of NaCl and Na2CO3, but the relative amounts of each compound in the sample are unknown.
AveGali [126]

Answer:

Concentration of sodium carbonate in the solution before the addition of HCl is 0.004881 mol/L.

Explanation:

Na_2CO_3(aq) +2 HCl(aq)\rightarrow 2NaCl(aq) + H_2O(l)+CO_2(g)

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Volume of HCl solution = 83.15 mL = 0.08315 L

Moles of HCl = n

molarity=\frac{moles}{Volume (L)}

0.1174 M=\frac{n}{0.08315 L}

n=0.1174 M\times 0.08315 L=0.009762 mol

According to reaction , 2 moles of HCl reacts with 1 mole of sodium carbonate.

Then 0.009762 mol of HCl will recat with:

\frac{1}{2}\times 0.009762 mol=0.004881 mol

Moles of Sodium carbonate = 0.004881 mol

Volume of the sodium carbonate containing solution taken = 1L

Concentration of sodium carbonate in the solution before the addition of HCl:

[Na_2CO_3]=\frac{0.004881 mol}{1 L}=0.004881 mol/L

4 0
3 years ago
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