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podryga [215]
2 years ago
12

Study Guide for Unit 3 1. Most rocks are a mixture of what?

Chemistry
1 answer:
Kipish [7]2 years ago
7 0

Answer:

most rocks are a mixture of crystals of one or more minerals, or organic matter

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Students are investigating the differences in open and closed systems. They heated 2 containers of water. They recorded their re
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Container 2 is a closed system because the mass did not change even

though the volume changed.

<h3>What is a Closed system?</h3>

A closed system is the type of system which prohibits the transfer of

matter in and out the system.

In a closed system , the mass of the matter present is always the same

regardless of the changes which occurred which is why option D is the

most appropriate option.

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2 years ago
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2 years ago
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5. What would be the temperature change if 12.5 g of water absorbed 35 J of heat?
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Explanation:

its 399929939932929292

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3 years ago
I want a pharmacist technician to help me with a question please
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2 years ago
The concentration of 1130+ in a solution is found to be 1.75 X 10-8 M 250C. Find [OH].
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Answer:

[OH] = 6.31 * 10^-7 M

Explanation:

Mathematically;

pH + pOH = 14

Mathematically;

pH = -log [H3O+]

also;

pOH = -log [OH]

From the question; [H3O+] = 1.75 * 10^-8 M

pH = -log [1.75 * 10^-8]

pH = 7.76

since pH is normally given to 1 decimal place

we can say pH = 7.8

Now;

pH + pOH = 14

pOH = 14-7.8

pOH = 6.2

now pOH = -log [OH]

[OH] = -antilog 6.2

[OH] = 6.31 * 10^-7 M

5 0
3 years ago
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