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3 years ago

This reaction supports the Law of Conservation of Mass (hint: is the equation balanced?):

Chemistry

1 answer:

enyata [817]3 years ago

7 0

Answer:

False

Explanation:

Left:

K = 2 atoms

O = 1 atoms

H = 1 atoms

Right: 

K = 2 atoms

O = 1 atoms

H = 2 atoms

O = 1 atoms

As you can see both sides do not have the same amount of atoms, therefore it is not balanced.

<h3>Hope this Helps!!</h3>

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What factors do not affect nuclear reactions, but do affect chemical reaction

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Unlike nuclear reactions, nuclear reactions are not affected by changes in temperature,
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3 years ago

Matter is made up of heat energy and ___________energy?

ella [17]

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2 years ago

Pollutants may be natural or man-made true or false

enyata [817]

Answer:

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2 years ago

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3 years ago

6. A 25.0-mL sample of potassium chloride solution was found to have a mass of 25.225 g.

Morgarella [4.7K]

Answer:

6. a. 5.53 (m/m) %; b. 0.7490M

7. 0.156M

Explanation:

6. In the solution of KCl, there are 1.396g of KCl in 25.225g of solution. As mass/mass percent is:

Mass solute / Mass solution * 100

The mass/mass percent of KCl is:

a. 1.396g KCl / 25.225g solution * 100

5.53 (m/m) %

b. Molarity is moles of solute per liters of solution:

Moles KCl -Molar mass: 74.55g/mol-:

1.396g KCl * (1mol / 74.55g) = 0.018726 moles KCl

Volume in liters: 25mL = 0.025L

Molarity:

0.018726 moles KCl / 0.025L = 0.7490M

7. 0.90% means 0.90g of NaCl in 100g of solution:

Moles NaCl -Molar mass: 58.44g/mol-:

0.90g NaCl * (1mol / 58.44g) = 0.0154 moles NaCl

Volume in Liters:

100g * (1mL / 1.01g) = 99mL = 0.099L

Molarity:

0.0154 moles NaCl / 0.099L =

0.156M

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2 years ago