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Gnom [1K]
2 years ago
11

Why do we need a “mole”?

Chemistry
2 answers:
Triss [41]2 years ago
7 0
The mole is important because it allows chemists to work with the subatomic world with macro world units and amounts
Ivan2 years ago
4 0
Wdym mole like the animal or something else ?
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I don’t get it plz help
d1i1m1o1n [39]
D=m/v. (Density equals mass over volume).
So in your case density = 4.2/6
Which equals 0.7
Your units will be grams over milliliters

So your answer is 0.7 g/ml
3 0
3 years ago
Why we need blood cholesterol?​
Rzqust [24]

Answer:

We need blood cholesterol because our body uses it to build your structure of cell membranes, make hormones like oestrogen, and testosterone, and to help your metabolism work well.

8 0
3 years ago
Read 2 more answers
Balance the following reaction:
NeX [460]

Answer:

3 Ca(OH)2 + 2 K3PO4 ---> Ca3(PO4)2 + 6 KOH

Explanation:

Just balance each atom on both sides.

8 0
2 years ago
Which statement is NOT correct? a. An activated complex has higher energy than any molecule contributing to it. b. If the forwar
Gnom [1K]

Answer:

<em>C.Activation energy is the same in the forward and reverse direction.</em>

<em>Explanation:</em>

<em>All these are true statements expect for option "C"</em>

5 0
3 years ago
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Which theory was contradicted by experiments with the photoelectric effect?
olga55 [171]

Answer:

C Visible light...

Explanation:

8 0
2 years ago
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