Question

ill in the blanks these are the options:

molar molecular grams per mole. molecules. grams. formula. formula units atoms

(a) one mole of nitrogen gas is 28.02____________

(b)___________mass of carbon tetrachloride is 153.81amu.

(c)___________mass of chromium(III) bromide is 291.7 atomic mass units

(d)one mole of lithium equal to 6.022 x 10^23 lithium__________

i am confused about parts b, c and d please explain them briefly, thank you

Answer 1

a)

one mole of nitrogen is 28.02 grams

b)

Molecular mass of carbon tetrachloride is 153.81 amu.

c)

Formula mass of chromium (3) bromide is 291.7 atomic mass unit .

d)

One mole of lithium equal to 6.022*10²³ lithium molecules .

[Note- Molecular mass and formula mass are actually the same thing . Only difference is that , molecular mass word is used for covalent molecules , who are individual. Formula mass is often used for ionic molecules, who have no specific single molecular existence , but stays in crystal or cluster .

amu is the mass unit for each molecule]