Qualification > Sciences

IGCSE CHEMISTRY DOUBTS HERE !!!!

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elemis:
1 minute.

elemis:
12.04/23 = 0.5235

11.52/11 = 1.047

29.32/16 = 1.833

47.12/18 = 2.62

Dividing all the above numbers by the lowest number gives a ratio of : 1 : 2 : 4 : 5

Formula = NaB2O45(H2O)

hence answer is C

elemis:
For second one.

Its Ultraviolet rays, they cause sunburn.

Adzel:
Thanks and +rep!!!  ;)

Adzel:
Ari or someone can you do this for me plz, I need to check my answers...  ;)

By the way +rep will be given... ;)

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