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MariettaO [177]
3 years ago
11

PLS I NEED UR HELP QUICK ILL BRAINLIST Nd gIVE U 5 star. answer in full sentence!

Chemistry
1 answer:
Oxana [17]3 years ago
6 0

Explanation:

1) There are three sub atomic particles; protons, neutrons and electrons. Protons and Neutrons are found in the nucleus while electrons are found in orbitals outside the Nucleus.

2)  No. This is not always the case. An example is sodium which has atomic mass of 23.

Atomic Mass = Neutrons + Protons

23 = Neutrons + 11

Neutrons = 23 - 11 = 12

In sodium there are 11 protons and 12 neutrons

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Answer:

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Explanation:

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What is the mass of oxygen in 3.34 g of potassium permanganate?
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Answer:

1.35 g

Explanation:

Data Given:

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First find the percentage composition of Oxygen in Potassium Permagnate (KMnO₄)

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Since the percentage of compound is 100

So,

                        Percent of Oxygen (O) = 64 / 158 x 100

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It means that for ever gram of Potassium Permagnate (KMnO₄) there is 0.405 g of Oxygen (O) is present.

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