Question

Calculate the number number of H-atoms in 98 gm of sulphuric acid​

Answer 1

Answer:

Given: 98 grams of H2SO4.

To find: Number of Hydrogen (H) atoms.

Explanation: Given mass of H2SO4= 98 grams. Molar mass of H2SO4. = 2 * molar mass of H + 1* molar mass of S+ 4* molar mass of oxygen. = 2*1 + 1*32 + 4*16. = 98 grams/ mol. Number of moles of H2SO4. = Given mass / molar mass. = 98 / 98.

Explanation:

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Answer 2

Answer:

2NA

Explanation:

Sulphuric acid = H2SO4

No. of H atoms in 98g H2SO4

= No. of moles of H2SO4 × NA × atomicity of H

= 98/98 × NA × 2

= 2NA or 2 × 6.022×10^23 = 12.044 × 10^23

* Here, No. of moles = Given mass/molar mass, Given mass was 98g and molar mass of H2SO4 is also 98g

NA = Avogadro's number (6.022×10^23)

Atomicity of H means total no. of H atoms in 1 molecule of H2SO4

* Formula used to find no. of atoms of H can also be used to find no. of atoms of S or O in the same question, just the thing is atomicity in the formula will change according