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3 years ago

Which of the following processes is exothermic?

Chemistry

2 answers:

nikitadnepr [17]3 years ago

5 0

Answer:

d. condensation of water

mr Goodwill [35]3 years ago

4 0

Answer:

I believe the answer is D). condensation of water.

Hope this helps, have a great day/night and stay safe!

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2 years ago

What are the three different types of selective breeding

balandron [24]

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3 years ago

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:

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

Molarity of HCl solution = 0.1174 M

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

What is true of a strong acid? (3 points)

forsale [732]

The answer is A it’s ionizes in water

5 0

3 years ago

Read 2 more answers

Which structure is unique to vertebrates?<br> limbs<br> brain<br> skin<br> backbone

IRISSAK [1]

Answer:

Backbone

Explanation:

Organisms that have backbones are known as vertebrates, while the ones without a backbone are classified as invertebrates.

4 0

3 years ago