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Alexxx [7]
2 years ago
15

Electrons are the most important electrons to an atom. a) outer b) inner

Chemistry
1 answer:
Gnom [1K]2 years ago
6 0
The answer is A.Outer. Hope this helps
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How many molecules of zinc oxide are there in a 2 kg sample?
Novosadov [1.4K]

There are 1.48 × 10²⁵ molecules of zinc oxide in a 2 kg sample. Details about number of molecules can be found below.

<h3>How to calculate number of molecules?</h3>

The number of molecules of a substance can be calculated by multiplying the number of moles of the substance by Avogadro's number.

According to this question, there are 2000g of ZnO in a sample. Zinc oxide has a molar mass of 81.38 g/mol.

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Therefore, there are 1.48 × 10²⁵ molecules of zinc oxide in a 2 kg sample.

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