C H E M I S T R Y

Q1. In 49 gm of H2SO4

Calculate :

n = w/M W = (n) (M) (n) (NA) (n)(NA) (n) (NA)

Mols Wt. in gms Atoms molecules Ions

H2SO4

H

H2

S

O

O2

H+

SO 24

Total number of atoms =

Q2. In 11.2 litre SO2 gas at NTP calculate

n = w/M W = (n) (M) (n) (NA) (n)(NA) (n) (NA)

Mols Wt. in gms Atoms molecules Ions

SO2

S

O

O2

O2

Total number of atoms =

Q3. If Ca(NO3)2 contains 28 gm nitrogen. Then calculate the whole table as previous

N = w/M W = (n) (M) (n) (NA) (n)(NA) (n) (NA)

Mols Wt. in gms Atoms molecules Ions

Ca

N

O

O2

NO3--

Total number of atoms =

Q4. In 1022

molecules of CuSO4. H2O. Then calculate the whole table as previous

N = w/M W = (n) (M) (n) (NA) (n)(NA) (n) (NA)

Mols Wt. in gms Atoms molecules Ions

Cu

S

O

O2

H2O

Total number of atoms =

Q5. In NaCl if there are 2NA Cl-- atoms, Then calculate the whole table as previous

N = w/M W = (n) (M) (n) (NA) (n)(NA) (n) (NA)

Mols Wt. in gms Atoms molecules Ions

Na

Cl

Na+

Cl--

Total number of atoms =

Q6. In H2SO4 if wt. of SO2

4

ions is 48 gm . Then calculate the whole table as previous

N = w/M W = (n) (M) (n) (NA) (n)(NA) (n) (NA)

Mols Wt. in gms Atoms molecules Ions

H2SO4

H

H2

S

O

O2

H+

SO 24

Total number of atoms =

Q7. In CaCl2 if there are NA Cl ions . Then calculate the whole table as previous

N = w/M W = (n) (M) (n) (NA) (n)(NA) (n) (NA)

Mols Wt. in gms Atoms molecules Ions

Ca

Cl

Cl2

Ca2+

Cl--

Total number of atoms =

Q8. In 122.5 g, Calculate the no. of each atoms in KClO3 and also Calculate the total number of atoms

N = w/M W = (n) (M) (n) (NA) (n)(NA) (n) (NA)

Mols Wt. in gms Atoms molecules Ions

K

Cl

O

Cl2

O2

Total number of atoms =