HARD
10th Tamil Nadu Board
IMPORTANT
Earn 100

Calculate the % relative abundance of B-10 and B-11, if its average atomic mass is 10.804 amu

Important Questions on Atoms And Molecules

EASY
10th Tamil Nadu Board
IMPORTANT

What is the SI prefix for the following multiple of a unit?

103

EASY
10th Tamil Nadu Board
IMPORTANT

What is the SI prefix for the following submultiple of a unit?

10-1

HARD
10th Tamil Nadu Board
IMPORTANT
If one mole of nitrogen molecules weighs 28 g, calculate the mass of one molecule of nitrogen in grams. 
MEDIUM
10th Tamil Nadu Board
IMPORTANT
Calculate the number of moles in 12.044×1025 atoms of phosphorus. 
HARD
10th Tamil Nadu Board
IMPORTANT

How many moles are represented by 100 g of glucose, C6H12O6? (C=12 u, H= 1 u, O=16 u)