Which has the highest mass ?
(a) 50 g iron (b) 5 moles of $N_{2}$
(c) 0.1 mol atom of Ag (d) $10^{23}$ atoms of carbon

Open in App

Solution

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= $\frac{W e i g h t s o f s u b s t a n c e}{m o l e c u l a r m a s s}$
$5 = \frac{W e i g h t o f N_{2}}{28}$
weight of $N_{2}$ = 140 g
c.) $0.1 g a t o m o f A g = 0.1 g$

d.) $10^{23} a t o m o f c a r b o n$
$6.023 \times 10^{23} a t o m s a r e p r e s e n t i n 12 o f c a r b o n$
$10^{23} a t o m w i l l b e p r e s e n t i n = \frac{10^{2} 3}{6.023 \times 10^{23}} \times 12$ = $1.992 g$
Hence b has the highest mass

Suggest Corrections

Similar questions

Q. (a) What is meant by 'a mole of carbon atoms' ?
(b) Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.
(Atomic masses : Al = 27 u ; Fe = 25 u)

Q. Find the number of moles of atoms present in 28 g of N atoms. (Gram atomic mass of N = 14 g)

Calculate the mass of
(i) 10²² atoms of sulphur,
(ii) 0.1 mole of carbon dioxide.

[Atomic mass: S = 32, C = 12 and O = 16 and Avogadro's Number = 6 × 10²³]

Q. Fill in the following blanks :
(a) 1 mole contains ...................... atoms, molecules or ions of a substance.
(b) A mole represents an ..................... number of particles of a substance.
(c) 60 g of carbon element are ................... moles of carbon atoms.
(d) 0.5 mole of calcium element has a mass of ......................
(e) 64 g of oxygen gas contains ....................... moles of oxygen atoms.

What do you understand by Mole? If 8.4 g X element includes $9.03 \times 10^{22}$ atoms and 0.1 mol $X_{2} Y_{3}$ compound is 16g, find atomic mass of Y element. (Avogadro number is $6.02 \times 10^{23})$ [5 MARKS]

Join BYJU'S Learning Program

Which has the highest mass ?(a) 50 g iron (b) 5 moles of N2(c) 0.1 mol atom of Ag (d) 1023 atoms of carbon

Which has the highest mass ?
(a) 50 g iron (b) 5 moles of $N_{2}$
(c) 0.1 mol atom of Ag (d) $10^{23}$ atoms of carbon