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Volgvan
2 years ago
9

A certain solution is 70% ethanol and the rest being distilled water. If there are 12 moles of ethanol per litre of solution, fi

nd the density of the solution.​
Chemistry
1 answer:
Aleks04 [339]2 years ago
6 0

Answer:

0.55284g/mL

Explanation:

Hello there!

In this case, given the by-mass percent of ethanol:

\frac{70gEt}{100gSol}

It is possible to compute the density by using its molar mass to find the grams in one liter of solution:

12\frac{molEt}{1L}*\frac{46.07 gEt}{1molEt}=552.85g/L

However, by taking the g/mL we obtain:

552.84\frac{g}{L} *\frac{1L}{1000mL}=0.55284g/mL

Which is the density of the solution.

Best regards!

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Answer:  This can be quickly solved with "traintracks"

Explanation:

You start w/ grams of water and want to find moles of oxygen gas produced.  

So you want to Convert:  

Grams of water -> moles of water -> moles of oxygen gas.  

The two things you need to know to set up the tracks are:  

1)Molar mass of water- H2O  

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6 0
3 years ago
How many of the electrons in a molecule of ethane are not involved in bondind​
vovikov84 [41]

Ethane consists of 6C−H bonds and 1C−C bond. Total number of bonds is 7. Each bond is made up of two electrons

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7 0
2 years ago
Aqueous acetic acid is neutralized by aqueous barium hydroxide. express your answer as a balanced molecular equation. identify a
Studentka2010 [4]

The balanced molecular equation for the given reaction is:

2CH_3COOH(aq) \ + \ Ba(OH)_2(aq) \rightarrow \ Ba(CH_3COO)_2(aq) + 2H_2O(l).

<h3>FURTHER EXPLANATION</h3>

To check that the equation is balanced count how many atoms are present for each element in the reactant and product side. If they are the same before and after reaction for all elements, then the reaction is deemed balanced.

The atom counting for the equation is shown below:

2CH_3COOH(aq) \ + \ Ba(OH)_2(aq) \rightarrow \ Ba(CH_3COO)_2(aq) + 2H_2O(l).

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C:  (2 x 2) =4                                  C: (2 x 2) = 4

H: (2 x 4) + (1 x 2) =10                    H: (3 x 2) + (2 X 2) = 10

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Since the number of atoms of each element are similar in the reactants and products, the equation is balanced.

To determine the state of the substances, consider their solubility.

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The other product is water which will be liquid (l) since it is the solvent used to dissolve the substances.

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Keywords: acid-base, neutralization, balancing equations, molecular equation

7 0
3 years ago
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4 0
2 years ago
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Answer:

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