Ion | Q4+ | Xb+ | Yc+ | Zd+ |
---|---|---|---|---|
Radius (pm) | 53 | 66 | 40 | 100 |
Q4+, Xb+, Yc+, Zd+ are respectively
The following data represents the frequency distribution of 20 observations:
Then its mean deviation about the mean is:
What is the molarity of a solution prepared by dissolving 5.85 g of NaCl in 500 mL of water?
(Molar mass of NaCl = 58.5 g/mol)