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3 years ago

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Cobalt chloride Select one: a. Does not exist as a hydrate b. Forms a single hydrate which may be pink or blue c. Forms differen

t hydrates which have different colors d. Is colorless in the presence of water

1 answer:

Anarel [89]3 years ago

4 0

Answer:

c. Forms different hydrates which have different colors

Explanation:

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Answer:

buffer action

Explanation:

the property of the solution to resist the changes in its pH value on the addition of small amounts of strong acid or base is known as buffer action

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3 years ago

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a clown in the park gave a child a balloon filled with 7.00 L of helium at 301 K. What will the volume of the balloon be when th

dybincka [34]

Answer:

6.9L

Explanation:

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3 years ago

You dissolve 3 moles of NaCl into 12 L of water. What is the Molarity?

DerKrebs [107]

Molarity is moles over liter. When checking for molarity, before diving, make sure the units are correct. In this case, both units are moles and liters, so we can assume the molarity is 3/12, or 0.25 M

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4 years ago

A sample of air at 58.6 kPa is expanded from 250 mL to 655 mL. If thetemperature remains constant, what is the final pressure in

kati45 [8]

Answer:

<h2>22.366 kPa</h2>

Explanation:

The final pressure can be found by using the formula for Boyle's law which is

$P_1V_1 = P_2V_2$

Since we are finding the final pressure

$P_2 = \frac{P_1V_1}{V_2} \\$

From the question

58.6 kPa = 58600 Pa

We have

$P_2 = \frac{58600 \times 250}{655} = \frac{14650000}{655} \\ = 22366.4122... \\ = 22366$

We have the final answer as

<h3>22.366 kPa</h3>

Hope this helps you

3 0

3 years ago

What is the approximate percent by mass of oxygen in C2H4O2

kherson [118]

Answer:

Approximately 53.3 %.

Explanation:

Molar mass of C2H4O2

= 2 * 12.011 + 4 * 1.008 + 2 * 15.999

= 60.052

% oxygen = (31.998* 100) / 60.052 = 53.28 %

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3 years ago