Science class 9.
No spam
Attachments:

Answers
Answered by
1
3.a) valency of He and N are 0,3 respectively
b). 58.5,110 respectively
c). 70
4.a)64/4=16 moles
b)12.044×10^23. / 6.023×10^23. =2moles
Hope it helps you !
Similar questions
History,
5 months ago
Social Sciences,
5 months ago
Science,
5 months ago
Economy,
10 months ago
Physics,
1 year ago