how many molecules are present in 7 gm of h2so4? find out the mass of the same number of a molecule of nitrogen.
Answers
Answered by
5
Answer:
0.07 moles
Explanation:
no. of moles=given mass/molar mass
molar mass of H2SO4 =98 g
given mass=7 g
So,no. of moles=7/98 =0.07
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Answered by
0
Answer:
Explanation:
- no. of moles = given mass(W) / molar mass(M) ----(i)
- no. of moles = no. of particle (N) / avagdros constant ------(ii)
- from (i) and (ii)---
- W/M = N/Na
- 7/98 = N/6.022 * 10^23
- N = 4.301 * 10^22 molecules
- ATQ,, it is said that for same no. of molecules we have to find mass of nitrogen
- so 1 molecule of notrogen have mass 28 gm
- W/28 = 4.301 * 10^22 / 6.022 * 10^23
- W = 1.99 gm
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