6.2
6.8
7.1
6.9
Correct answer is D
(\(\frac{90}{100}\) x 7) + (\(\frac{10}{100}\) x 6)
= 6.3 + 0.6 = 6.9
How many protons does 4020Ca contain?...
Commercial bleaching can be carried out using ...
Chlorine atom forms Cl- by ...
The species with no electron in the 3d-orbital is ...
The use of diamond in abrasives is due to its ...
Which of the following solids has a network structure? ...
The pollutant usually presents in a city which generates its electricity from coal? ...