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Natasha_Volkova [10]
2 years ago
11

A hydrocarbon with vapour density

Chemistry
1 answer:
Dafna1 [17]2 years ago
4 0

Answer:

the answer is C4H10 I hope I helped

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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.

no of moles = 2000g ÷ 81.38g/mol

no of moles = 24.57mol

number of molecules = 24.57 × 6.02 × 10²³

number of molecules = 147.95 × 10²³

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

Learn more about number of molecules at: brainly.com/question/11815186

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What class of elements do iron and nickel belong?
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