Question

A sample of ammonia weighs 4 gram .what mass of sulphur dioxide contains the same number of molecules as are in 4 gram ammonia?​

Answer 1

Answer:

15.05

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Answer 2

Given - Mass of ammonia = 4 gram

Find - Mass of sulphur dioxide containing same number of moles.

Solution - 1 mole of any substance contains molecules equal to Avogadro's number.

Number of moles of ammonia = 4/17

Number of molecules in given moles of ammonia = 6.022*10²³*4/17

Now, 6.022*10²³ molecules are present in 1 mole of sulphur dioxide

So, 6.022*10²³*4/17 molecules will be present in number of moles of sulphur dioxide = 6.022*10²³*4/17/6.022*10²³

Number of moles = 4/17

Now, number of moles = mass/molar mass

4/17 = mass/64

Mass = 64*4/17

Mass = 15 gram

Hence, 15 gram of sulphur dioxide contains the same number of molecules as are in 4 gram ammonia.