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jek_recluse [69]
3 years ago
11

Which is the molar mass of BF3?

Chemistry
1 answer:
Eduardwww [97]3 years ago
3 0
The answer is 67.82 g/mol
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1. How many molecules are in 240g of sulfuric acid?
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Answer:

14.8 × 10²³ molecules

Explanation:

Given data:

Mass of sulfuric acid = 240 g

Number of molecules = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

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Number of moles of sulfuric acid

<em>Number of moles = mass/ molar mass</em>

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Number of moles = 2.45 mol

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1 mole = 6.022 × 10²³ molecules

2.45 × 6.022 × 10²³ molecules

14.8 × 10²³ molecules

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