________mixtures are those Which have same composition throughout.
Homogeneous
Different
Water
None
What is the SI unit of mass?
kg
mg
lg
cm3
Example of homogeneous mixture.
Air
Salt solution
none
Calculate the molecular mass of H2O
14u
16u
18u
22u
The density of 3m solution of Nacl is 1.25g ml-1 calculate molarity of the solution.
2.10 mol/kg
3.7 mol/kg
2.79 mol/kg
2.9 mol/kg
Unit of power is
Watt
∫
Mol
H2
How many different elements are known to exist?
140
160
110
115
H2 is
Monatomic
Diatomic
Triatomic
None of these
__________is a substance which is made up of only one kind of atoms.
atom
element
matter
none of these