Question

Which of the choices below has the greatest mass?

a) 2 moles of zinc

b) 1 mole of silver

c) 6.022*10^23 atoms of CO2

d) all have comparably the same mass

Answer 1

Lets calculate the mass of each given options

a)

Molar mass of Zn = 65.38 g/mol

we have below equation to be used:

mass of Zn,

m = number of mol * molar mass

= 1 mol * 65.38 g/mol

= 65.38 g

b)

Molar mass of Ag = 107.9 g/mol

we have below equation to be used:

mass of Ag,

m = number of mol * molar mass

= 1 mol * 107.9 g/mol

= 107.9 g

c)

6.022*10^23 atoms is 1 mol

Molar mass of CO2,

MM = 1*MM(C) + 2*MM(O)

= 1*12.01 + 2*16.0

= 44.01 g/mol

we have below equation to be used:

mass of CO2,

m = number of mol * molar mass

= 1 mol * 44.01 g/mol

= 44.01 g

Clearly answer is b

Answer: b