Answer to Question #52248 in Physical Chemistry for vi

Question #52248

14 Fractional distillation cannot be used to _____________.
separate the components of liquid air
refine crude oil
test the purity of a substance
separate methanol and water
15 Angstrom is a unit of ___________.
elasticity
velocity
length
mass
16 Which one of the following can be separated by adding water, stirring and filtering?
Salt and copper sulphate
Salt and sugar
Copper and tin
Sulfur and sugar
17 In order to dissolve the greatest amount of sugar in a cup of water, you should __________.
use sugar crushed into small pieces, and heat the water
use sugar crushed into small pieces, and cool the water
use sugar in large pieces, and heat the water
use sugar in large pieces, and cool the water
18 Convert 10 kg to mg.
10,000,000 mg
10,000 mg
1,000 mg
1,000,000 mg
19 Distillation can be used to separate ______________.
a soluble solid from a solution
a liquid from a solution
a solid from a solid
an insoluble solid from a solution
20 The S.I basic unit for luminous intensity is
Ampere
Lumin
Candela
volt

Expert's answer

14. separate the components of liquid air
15. length
16. Salt and sugar
17. use sugar crushed into small pieces, and heat the water
18. 10,000,000 mg
19. a liquid from a solution
20. Candela