A compound which contains one atom of X and two atoms of Y for each three atoms of Z , is made by mixing 5 . 00 g of X , 1 . 15 × 10 23 atoms of Y and 0 . 03 mole of Z atoms. Given that only 40 g of compound results, calculate the atomic weight of Y , if the atomic weight of X and Z are 60 and 80 amu , respectively.

One atom of X and two atoms of Y , for each of three atoms of Z , is made by mixing 5 . 00 g of X , 1 . 15 × 10 23 atoms of Y and 0 . 03 moles of Z atoms. The compound = XY 2 Z 3 5 g of X or 5 60 moles of X were used. Thus, 10 60 moles of Y were used. 0 . 03 moles of Z were used. Given that only 40 g of compound results, Since, Number of moles n = Mass ( m ) Molecular weight ( M ) 5 + M × 10 60 + 0 . 03 × 80 = 40 M 6 = 40 - 7 . 4 = 32 . 6 M = 6 × 32 . 6 = 195 . 6 g .

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Which of the following contains same number of molecules?

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Important Questions on Some Basic Concepts, Mole Concept and Stoichiometry

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Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 1 - Some Basic Concepts, Mole Concept and Stoichiometry>DPP 1.3>Q 19

For

3 mole

of ammonia gas, which of the following is true?

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Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 1 - Some Basic Concepts, Mole Concept and Stoichiometry>DPP 1.4>Q 1

A compound which contains one atom of

X

and two atoms of

Y

for each three atoms of

Z

, is made by mixing

5.00 g

X

1.15 \times 10^{23}

atoms of

Y

and

0.03 mole

Z

atoms. Given that only

40 g

of compound results, calculate the atomic weight of

Y

, if the atomic weight of

X

and

Z

are

60

and

80 amu

, respectively.

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Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 1 - Some Basic Concepts, Mole Concept and Stoichiometry>DPP 1.4>Q 2

For the reaction given below, calculate the mass of $FeO$ produced from $2 g VO$ and $5.75 g$ of ${Fe}_{2} O_{3}$ . Also, report the limiting reagent.

$VO + {Fe}_{2} O_{3} ⟶ FeO + V_{2} O_{5}$

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Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 1 - Some Basic Concepts, Mole Concept and Stoichiometry>DPP 1.4>Q 3

Carbon disulphide ${CS}_{2}$ can be made from the by-product of ${SO}_{2}$ . The overall reaction is:

$5 C + 2 {SO}_{2} ⟶ {CS}_{2} + 4 CO$

How much of ${CS}_{2}$ can be produced from $440 kg$ of waste ${SO}_{2}$ with $60 kg$ of coke, if the ${SO}_{2}$ conversion is $80 %$ ?

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Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 1 - Some Basic Concepts, Mole Concept and Stoichiometry>DPP 1.4>Q 4

Find out the weight of zinc that would be required to produce enough hydrogen to reduce completely

8.5 g

of copper oxide to copper? (Atomic mass: H-1, O-16, S-32,Cu-63.5, Zn-65.4)

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Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 1 - Some Basic Concepts, Mole Concept and Stoichiometry>DPP 1.4>Q 5

200 mL

of any gas at

N . T . P

was heated with tin. Tin got converted into stannous sulphide and hydrogen was left. This hydrogen when passed over hot

CuO

, produced

0.162 g

H_{2} O

. Suppose the vapour density of the gas is

17

, find its formula.

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Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 1 - Some Basic Concepts, Mole Concept and Stoichiometry>DPP 1.4>Q 6

Calculate the amount of $Ni$ needed in the Mond's process given below.

$Ni + 4 CO ⟶ Ni (CO)_{4}$

If $CO$ used in this process is obtained through a process, in which $6 g$ of carbon is mixed with $44 g {CO}_{2}$ .

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Chapterwise/Topicwise Daily Practice Problems (DPP) Physical Chemistry Part 1 JEE Main & Advanced>Chapter 1 - Some Basic Concepts, Mole Concept and Stoichiometry>DPP 1.4>Q 7

Equal weight of '

X

' (atomic weight

= 36

) and '

Y

' (atomic weight

= 24

) react to form the compound,

X_{2} Y_{3}

. If that is the case, then

Which of the following contains same number of molecules?

Important Questions on Some Basic Concepts, Mole Concept and Stoichiometry

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