nios assignment 2017-2018 answers science 212
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Ans1 (b) :- mole is such a unit in chemistry for counting entities like atoms , molecules , ions etc , It describes about what amount of particles a Matter content .
now,
No.of mole =given mass/molar
mass of water
= 45/18
= 2.5 mol
Then ,
No.of molecules = no of mol × Avogadro no.
= 2.5 × 6.022 × 10^23
= 15.055 × 10^23
Ans2 (b) :- Zns is oxidized as it gains oxygen .
AgNO³ is reduced as it loses oxygen .
(ii) MnO² is reduced as oxygen is removed HCL is oxidized as it gains oxygen .
now,
No.of mole =given mass/molar
mass of water
= 45/18
= 2.5 mol
Then ,
No.of molecules = no of mol × Avogadro no.
= 2.5 × 6.022 × 10^23
= 15.055 × 10^23
Ans2 (b) :- Zns is oxidized as it gains oxygen .
AgNO³ is reduced as it loses oxygen .
(ii) MnO² is reduced as oxygen is removed HCL is oxidized as it gains oxygen .
Anonymous:
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