8.97 g/cm^
D=m/v
D=43.5/4.85cm^3
D=8.97 g/cm^3
Alkali: Group 1(I A). Halogens: group 17 (VII A)
Answer : The concentration of ion is,
Solution : Given,
pH = 4.20
First we have to calculate the pOH.
As we know that,
Now we have to calculate the concentration of ion.
Therefore, the concentration of ion is,
The unit of measurement for weight is that of force, which in the International System of Units (SI) is the newton. For example, an object with a mass of one kilogram has a weight of about 9.8 newtons on the surface of the Earth, and about one-sixth as much on the Moon.