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SVETLANKA909090 [29]
3 years ago
6

Help me plz with these problems

Chemistry
2 answers:
lesantik [10]3 years ago
7 0
1. A
2. C
3. A
4. A
5. C
loris [4]3 years ago
6 0
1 it a 2 it b 3 it c 4 it be 7 it a
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How many electrons are shared in a double covalent bond?
AleksAgata [21]
In a double covalent bonds there are 4 valence electrons that are shared.
8 0
3 years ago
Read 2 more answers
Calculate the pH of a solution in which [OH–] = 4.5 × 10–9M.
posledela

Answer:

5.65 is the pH.

Explanation:

I am assuming that you are asking for confirmation on your answer. The answer is 5.65.

You would do:

[pOH] = -log[OH-]

          = -log[4.5*10^-9]

         equals about 8.3468

To find pH your would subtract the pOH from 14.

14-8.3468 = 5.65 << Rounded to match the answer choices.

7 0
3 years ago
Consider the volume of gas collected in the trial in Experiment 2 for Ni at
ZanzabumX [31]

Answer:

Explanation:

H20

5 0
2 years ago
Which physical property of matter do these four objects have in common?
aleksandrvk [35]

Answer:

A- Non-magnetic

Explanation:

Brass, rubber, plastic, and glass will not be attracted by a magnet.

4 0
3 years ago
Why might a scientist repeat an experiment if she did not make a mistake in the first one? A) Scientists who repeat experiments
9966 [12]

Answer:

The correct answer is B) it helps to ensure the result are consistent and repeatable.

Explanation:

Scientist generally repeat an experiment if he or she did not make a mistake in the first one to compare the results of two experiment, if there is no difference in the result or values obtainted from the observation of two experiment. he or she become sure that experiment was done in a right way because if there is some error made when experiment was carried out then the result of two same experiment would be different.

3 0
3 years ago
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