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Marat540 [252]
2 years ago
13

What are the answers to these?

Chemistry
1 answer:
Eva8 [605]2 years ago
7 0

Answer:

1)physical change

Explanation:

2)chemical change

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What is the pH of the solution if the [H+] is 1 x 10-12 ?
jarptica [38.1K]

Answer:

<h2>12</h2>

Explanation:

The pH of a solution can be found by using the formula

pH = - log [ {H}^{+} ]

From the question we have

pH =  -  log(1 \times  {10}^{ - 12} )  \\

We have the final answer as

<h3>12</h3>

Hope this helps you

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When forming ions, nitrogen will gain or lose how many electrons, forming a cations or anions with a what charge?
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Answer:

Nonmetals form negative ions (anions). A nitrogen atom must gain three electrons to have the same number of electrons as an atom of the following noble gas, neon. Thus, a nitrogen atom will form an anion with three more electrons than protons and a charge of 3−.

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