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Nastasia [14]
2 years ago
11

Help me answer these questions

Chemistry
2 answers:
kompoz [17]2 years ago
8 0
For the first one I think it’s A, and I think the second one is C. Those seem most logical.
nirvana33 [79]2 years ago
3 0

Answer:

3.

a.climate

4.

c.average measurements of temperature and rainfall over many years

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Please help me with this question
Inessa05 [86]

From the calculation, the concentration in parts per billion is 6 ppb.

<h3>What is ppb?</h3>

The term ppb refers to the concentration of a substance in parts per billion. We obtain the ppb using the formula;

Mass of solute/ Mass of solution * 10^9

Now, 1L = 1000cm^3 = 1000 g

The concertation in ppb = 6 * 10^-6 g/1000 g * 10^9

= 6 ppb

Learn more about parts per billion:brainly.com/question/9179966

#SPJ1

4 0
2 years ago
No attempt was made to test sodium with hydrochloric<br> acid. Why not?
Fiesta28 [93]

Answer:

the reaction is violent and quick

Explanation:

3 0
2 years ago
Hook was the first to discover cells in a cork. true or false?
aliina [53]
True, Robert Hooke was the first person to discover cells inside a cork.
5 0
3 years ago
If a 65 kilogram student exerts a force with a magnitude of 100 N on a 100 kilogram desk the magnitude of the force that the des
mrs_skeptik [129]
C. The action/reaction law states that a force is equal in both directions.
4 0
3 years ago
The different phases of the Moon refer to A. Changes in the Moon's shape. B. Changes in the Moon's visibility. C. Changes in sea
Sav [38]

Answer:

B. Changes in the Moon's visibility.

Explanation:

The moon's shifting of position makes it "appear" as being smaller or bigger. This is simply because the moon is rotating and the sun's light shines on a certain area of the moon, and depending on where we are on the Earth is how the moon looks or appears to our perspective.

5 0
3 years ago
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