Calculate the molecular mass of the following.
(i)`H_2O`
(ii) `CO_2`
(iii) `CH_4`

Calculate the molar mass of CH_4 .

Calculate the molecular mass of the following: H_2O , CO_2 , CH_4

Calculate the molecular mass of the following? i. C_6H_(12)O_6 ii. HNO_3

Find the molecular mass of the followign H_2O, HNO_3, H_2SO_4 .

Draw the molecular structures of (i) XeF_2 (ii) XeOF_2 and (iii) XeF_4

Calculate the number of molecules in each of the following: 1 g CO_2 (Given that N_A is 6.02xx10^23 , molecular mass of N_2 is 28 and CO_2 is 44.)

Calculate the molecular mass of glucose (C_6H_(12)O_6 and sulphuric acid (H_2SO_4)

Calculate the number of molecules in each of the following : 1 g N_2 , 1 g CO_2 . ( Given that N_a is 6.02 xx 10^23 , molecular mass of N_2 is 28 and CO_2 is 44).

Calculate the equivalent weight of the following: (i) KMnO_4 in acidic medium (ii) KMnO_4 in alkaline medium (iii) FeSO_4 (NH_4)_2 SO_4. 6H_(2) O (converting to Fe^(3+) ) (iv) K_2 Cr_2 O_7 in acidic medium (v) H_2 C_2 O_4 (converting to CO_2 ) (vi) Na_(2) S_(2) O_(3). 5H_(2) O ( reacting with I_2 )

Calculate the enthalpy of formation of CH_4 from the following data: C_(s) + O_(2(g)) rarr CO_2(g) DeltaH = -393.5 kJ//mol 2H_(2(g) + O_(2(g)) rarr 2H_2O_(l) DeltaH = -571.8 kJ//mol CH_4(g)+ 2O_(2(g)) rarr CO_2(g) +2H_2O_(l) DeltaH = -890.3 kJ//mol