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Monica [59]
11 months ago
10

How many moles of NaCl are required to make 2.85L of a 0.10M solution?Use the correct abbreviation for the UNITS and watch the S

igFigs
Chemistry
1 answer:
Ira Lisetskai [31]11 months ago
3 0

Step 1

Molarity is defined as follows:

Molarity\text{ \lparen mol/L or M\rparen= }\frac{Number\text{ of moles}}{Volume\text{ of solution \lparen L\rparen}}=\text{ }\frac{n}{V(L)}

---------

Step 2

<em>Data provided: </em>

V(L) = 2.85 L (solution)

Molarity = 0.10 M or mol/L

---------

Step 3

<em>Procedure:</em>

Molarity = n/V(L)

Molarity x V(L) = n

0.10 mol/L x 2.85 L = n

0.29 moles = n

Answer: 0.29 moles of NaCl

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Answer:

Both roots are imaginary roots.

Explanation:

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2 years ago
Which of the following equations does not demonstrate the law of conservation of mass?
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The third option does not obey the law of conservation of mass.

Option 3.

Explanation:

The law of conservation of mass states that the sum of the masses of reactants should be equal to the sum of the masses of the products.

For example, if we consider the first option to verify if it obeys law of conservation of mass or not, 2 Na + Cl₂ → 2 NaCl

So one way to verify it is to find the mass of Na, then multiply it with 2, and then add this with 2 times of mass of chlorine. So this sum should be equal to the 2 times mass of NaCl. But it is somewhat lengthy.

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The fourth option also obeys the law of conservation of mass as the number of atoms of each element is same in both the product and reactant side.

Thus, the third option does not obey the law of conservation of mass.

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