Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 3

EASY

NDA & NA EE

IMPORTANT

Earn 100

Chlorine occurs in nature in the form of two isotopes with atomic mass $35$ and $37$ in the ratio of $3 : 1$ , respectively. The average atomic mass of chlorine is:

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Important Questions on Atoms and Molecules

EASY

NDA & NA EE

IMPORTANT

Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 4

2 g

of oxygen contain the number of atoms equal to that, contained in:

EASY

NDA & NA EE

IMPORTANT

Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 5

The number of sulphur atoms in

40 g

is:

EASY

NDA & NA EE

IMPORTANT

Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 7

How many atoms are present in one mole of

H_{2} {SO}_{4} ?

EASY

NDA & NA EE

IMPORTANT

Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 8

The mass of a molecule of water is:

EASY

NDA & NA EE

IMPORTANT

Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 9

A compound

X_{2} O_{3}

contains

31.58 %

oxygen by weight. The atomic mass of

X

is ______.

EASY

NDA & NA EE

IMPORTANT

Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 10

The law of constant proportion was proposed by

EASY

NDA & NA EE

IMPORTANT

Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 11

The law of multiple proportions was proposed by

EASY

NDA & NA EE

IMPORTANT

Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 12

Two elements

A

and

B

combine to form two compounds in which

a_{1} g

of

A

combines with

b_{1}

and

b_{2} g

of

B

, respectively. According to the law of multiple proportions