Atomic mass- The atomic mass (A) of an element is defined as the average mass of an atom of an element in the atomic mass unit. The atomic mass of an element is the weighted average of the atomic masses of all the isotopes of an element.

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 9

HARD

9th CBSE

IMPORTANT

Earn 100

Phosphorus forms two oxides. The phosphorus content in one oxide is $56.36 %$ while that in the other oxide it is $43.66 %$ . Show that these data are in agreement with the law of multiple proportions.

Important Questions on Atoms and Molecules

HARD

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 10

Phosphorus forms two chlorides. The phosphorus content in one chloride is 22.54% while that in the other oxide it is 14.87%. Show that these data are in agreement with the law of multiple proportions.

Note- The question given in the book seems to be incorrect. The corrected question is as follows:

Phosphorus forms two oxides. The phosphorus content in one oxide is $22.54 %$ while that in the other oxide it is $14.87 %$ . Show that these data are in agreement with the law of multiple proportions.