# How many moles are present in 1.21 X 10^24 molecules of HBr?

##### 1 Answer

Jul 28, 2014

One mole of HBr has 6.02 x 1

1 mole of HBr = 6.02 x 1

X mole of HBr has 1.21 x

X mole of HBr = 1.21 x

Taking ratio of (a) and (b)

X / 1 = 1.21 x

X= 2.009 moles.