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PIT_PIT [208]
2 years ago
5

Suppose you found an unknown substance in a laboratory. It has the formula H2O2 written on the bottle. Is it water? How do you k

now?
Chemistry
1 answer:
Brilliant_brown [7]2 years ago
4 0
It is not water because water is H2O. H2O2 is Hydrogen Peroxide
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Brad and Matt are working in the lab. They noticed that when they mixed two dilute solutions together, the reaction between them
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Answer:

c.) increase the concentration of one of the solutions

Explanation:

3 0
3 years ago
Group viia elements are very active non metals give reason​
Marianna [84]

Answer:

because they need only one electron

4 0
3 years ago
How to find how many electrons are in an element
Murljashka [212]

Explanation:

1) Locate the atomic number in the upper left corner of the square. The atomic number will tell you the number of protons

2) In a neutral state, the element will contain the same number of protons as it will electrons.

--> Boron (B) has an atomic number of 5, so it has 5 protons.

--> Having 5 protons (+1 charge each) means to be balanced, it must have 5 electrons (-1 charge each)

However, what if it's not in a neutral state?

If it's not in a neutral state, it will look something like this:

Ca ^ 2+

<em>Btw, the "^" means that it will be written like it's an exponent. That confuses people sometimes.</em>

Anyways, the "2+" means it's an ion with a positive charge of 2. For us to have a positive charge, it means it's lost two electrons (cause electrons are negative, so taking them away means we are left with a more positive charge).

To get the number of remaining electrons, subtract the 2 from the atomic mass. In this case, that would be 20.

20 - 2 = 18 electrons

Another example:

N ^3-

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7 + 3 = 10 electrons.

Why did I add here instead of subtracting? It's cause the 3- means we have added electrons, resulting in the ion having a negative charge. It's got more electrons than usual.

Hopefully this helps a bit.

5 0
3 years ago
How many atoms are in ErAg
Semmy [17]
6.022 * 10^23 atoms
3 0
3 years ago
Which law represents a balanced chemical equation?​
Montano1993 [528]

Answer:

All chemical equations goes to the law of conservation of mass which says that matter can not be destroyed nor created which means there has to be an equal amount of atoms of each element on both sides of the equation. I hope that helps, I'm learning this as well.

8 0
3 years ago
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