Question

guys plez give answer for these questions...plez no spam answers...​

Answer 1

question no. (1) Surface area per per gram of silica gel = area occupied by each N sufix2*no.of N sufix2 molecules = 16.2*10-2*(129/22400)*6.0*10 23 = 560 m square

After dividing by 100 we get 5.6 ≈ 6

Answer 2

spontaneous combustion. The bursting into flame of a mass of material as a result of chemical reactions within the substance, without the addition of heat from an external source. Oily rags and damp hay, for example, are subject to spontaneous combustion.