Question

PROGRESS TEST 1
Explain (i) Empirical formula (ii) Molecular formul
Calculate the number of moles in 2400 g of (i) CO,
(iii) CaCO3, (iv) MgBr,
[ Ans: (i) 54.54 moles (ii) 75 moles (iii) 24.0 mole
What is Avogadro's number? Calculate the number

Answer 1

Answer:

CO= 75moles , CaCO3 = 24 moles , MgBr = 54.54

Explanation:

empirical formula= a formula which gives simplest whole number ration of atoms in a molecule

molecular formula= a formula which tells us actual number of atoms in a molecule

CO = 12 + 16 = 28 , 2400\28 = 75moles

CaCO3 = 40+12+48 = 100, 2400\100 = 24moles

similarly MgBr have 54.54 moles

6.02x1023 is called avogadroes number it's represented by NA