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Standard X

Chemistry

Molecular Mass

Which of the ...

Question

Which of the following would weight most
(a) 1 mole of $H_{2} O,$ (b) 1 mole fo $C O_{2}$ ,
(c) 1 mole of $N H_{3}$ (D) 1 mole fo CO?

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Solution

Weight of 1 mole of $H_{2} O = 2 \times 1 + 16 = 18 g$

Weight of 1 mole of $C O_{2} = 12 + 2 \times 16 = 44 g$

Weight of 1 mole of $N H_{3} = 14 + 3 \times 1 = 17 g$

Weight of 1 mole of $C O = 12 + 16 = 28 g$

So option b is correct.

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Similar questions

Q. For the reaction,

{C O}_{2} (g) + H_{2} (g) ⇌ C O (g) + H_{2} O (g)

the value of Kc at

552^{\circ} C

is 0.137. If 5 moles of

{C O}_{2}

, 5 moles of

H_{2}

, 1 mole of

C O

and 1 mole of

H_{2} O

are initially present what are the actual concentrations of

{C O}_{2}, H_{2}, C O, H_{2} O

at equilibrium?

Find the :
(a) Number of molecules in 73 g of HCl,
(b) Weight of 0.5 mole of $O_{2}$ ,
(c) Number of molecules in 1.8 g of $H_{2} O,$
(d) Number of moles in 10 g of $C a C O_{3}$
(e) Weight of 0.2 mole fo $H_{2}$ gas,
(f) Number of molecules in 3.2 g of $S O_{2}$

Which of the following weighs the least?
(a) 2 g atom of N (b) $3 \times 10^{25}$ atoms of carbon
(c) 1 mole fo sulphur (d) 7 g silver

Q. In a

20

litre vessel initially

1

1

mole

C O, H_{2} O

C O_{2}

is present, then for the equilibrium of

C O + H_{2} O ⇌ C O_{2} + H_{2}

following is true?

Q. Which has a higher mass : 1 mole of

C O_{2}

or 1 mole of

C O ?

(Mass of

C = 12,

Mass of

O = 16

)

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Which of the following would weight most (a) 1 mole of H2O, (b) 1 mole fo CO2, (c) 1 mole of NH3 (D) 1 mole fo CO?

Weight of 1 mole of H2O=2×1+16=18g Weight of 1 mole of CO2=12+2×16=44g Weight of 1 mole of NH3=14+3×1=17g Weight of 1 mole of CO=12+16=28g So option b is correct.

Which of the following would weight most
(a) 1 mole of $H_{2} O,$ (b) 1 mole fo $C O_{2}$ ,
(c) 1 mole of $N H_{3}$ (D) 1 mole fo CO?

Weight of 1 mole of $H_{2} O = 2 \times 1 + 16 = 18 g$

Weight of 1 mole of $C O_{2} = 12 + 2 \times 16 = 44 g$

Weight of 1 mole of $N H_{3} = 14 + 3 \times 1 = 17 g$

Weight of 1 mole of $C O = 12 + 16 = 28 g$

So option b is correct.