Mass concepts

Question 1

Unit of Relative atomic mass

Answer 1

It has no unit

Question 2

What does relative atomic mass indicate

Answer 2

How many times is the atom of an element heavier than 1/12th of the mass of C-12 atom

Question 3

Formula of RAM

Answer 3

mass of one atom of an element/ 1/12th mass of one C-12 atom OR Atomic mass x amu / amu

Question 4

True or false : C-12 is an isotope of carbon

Answer 4

True

Question 5

What is the device which was used to calculate mass of 1 C-12 atom?

Answer 5

Mass spectrometer

Question 6

What is the mass of one C-12 atom?

Answer 6

1.992648 x 10^-23 gm

Question 7

1 atomic mass unit = _______gm

Answer 7

1.67 x 10^-24 gm or 1.67 x 10^-27 kg

Question 8

1 atomic mass unit = _______ ( in terms of mass of C-12 atom)

Answer 8

1/12th mass of one C-12 atom

Question 9

Atomic mass definition

Answer 9

Mass of one atom of an element expressed in amu.

Question 10

Atomic mass of H

Answer 10

1.008 amu

Question 11

RAM of H

Answer 11

1

Question 12

Atomic mass

Answer 12

RAM X 1 amu

Question 13

Molecular mass

Answer 13

Relative molecular mass x amu

Question 14

Actual mass ( 1st )

Answer 14

RAM x 1.67 x 10^-24 gm

Question 15

Actual mass ( 2nd )

Answer 15

RAM X amu ( same as atomic mass/molecular mass)

Question 16

Atomicity definition

Answer 16

No. of atoms in 1 molecule of an element/compound