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Mice21 [21]
2 years ago
13

What is the mass of an atom with 8 protons, 8 electrons, and 8 neutrons?

Chemistry
1 answer:
mafiozo [28]2 years ago
5 0

Answer:An oxygen atom usually has 8 protons, 8 neutrons, and 8 electrons. Looking at the periodic table, oxygen has atomic number 8 and atomic weight 15.999.

Explanation:

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In which of the following sets are the charges given correctly for all the
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B) K⁺, Sr²⁺ , O²⁻

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Potassium is present in group one. It is alkali metal and have one valance electron.Potassium need to lose its one valance electron and form cation to get complete octet.

That's why it shows K⁺.

Sr is alkaline earth metal. It is present in group two. It has two valance electrons. Strontium needed to lose its two valance electrons and get stable electronic configuration.

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O²⁻

3 0
3 years ago
If 75.0 g of a liquid has a volume of 62.4 mL ,calculate the liquid’s density
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<span>To calculate the density of a liquid, you have to first know that density is the amount of substance per unit of volume. In this specific question, density will be found with units of g/mL. Now, the density can be found by dividing the amount of liquid, 75.0g, by the volume, 62.4mL. Doing this we get: 75.0g/62.4mL= 1.2 g/mL as the density of the liquid.</span>
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