3.1 Relative Atomic Mass and Relative Molecular Mass

Report 1 / 5

The relative molecular mass of \(X_2Y_3\) is 60.

What is the relative atomic mass of one atom of \(Y\), given that the relative atomic mass of three atoms of \(X\) is 45?

Difficulty Level: Medium

Report 2 / 5

What is the relative formula mass for \(Fe(NO_3)_3\)?

[Relative atomic mass: \(Fe = 56,\, N= 14, \, O=16\)]

Difficulty Level: Easy

Report 3 / 5

Which of the following has the correct relative molecular mass, RMM or relative formula mass, RFM?

[Relative atomic mass: \(Na=23,\, N= 14,\, O=16,\, Fe=56,\, C=12,\, Cl= 35.5,\, H=1\)]

Difficulty Level: Medium

Report 4 / 5

Why carbon-12 was chosen as a reference standard for relative atomic mass and relative molecular mass?

(A)		Carbon has three isotopes

(B)		Carbon is a non-metal element

(C)		Carbon is a solid and easier to handle

(D)		Carbon is located in Group 14 in the Periodic Table of Elements

Difficulty Level: Medium

Report 5 / 5

How many numbers of atoms of beryllium is needed to have the same relative atomic mass, RAM as three atoms of silver?

[Relative atomic mass, RAM: \(Be=9, \,Ag=108\)]

Difficulty Level: Easy