Question

Which has the highest mass?
(1) 50 g of iron
(2) 1.5 moles of N
(3) 0.1 g atom of Ba (atomic mass = 137 amu)
(4) 1023 atoms of carbon​

Answer 1

Explanation:

the correct option is b

We shall convert all values into grams

a.) 50 g fe weigh=50g

b.)5 moles of N

2

=

we know no. of moles=

molecularmass

Weightsofsubstance

5=

28

WeightofN

2

weight of N

2

= 140 g

c.)0.1gatomofAg=0.1g

d.)10

23

atomofcarbon

6.023×10

23

atomsarepresentin12ofcarbon

10

23

atomwillbepresentin=

6.023×10

23

10

2

3

×12=1.992g

Hence b has the highest mass