Question : Calculate the number mass of following substance. a) Ethyne , C_2 H_2 O b) Sulphur molecule , S_8 Phosphorus molecules , P_4d) Nitric acid, HNO_3 Nitric and , HNO_3

Question : Calculate the number mass of following substance. a) Ethyne

1.	Question : Calculate the number mass of following substance. a) Ethyne , C_2 H_2 O b) Sulphur molecule , S_8 Phosphorus molecules , P_4d) Nitric acid, HNO_3 Nitric and , HNO_3
Answer» Solution :Molar mass of ethyne , `C_2 H_2 = 2xx 12 + 2 xx 1` = 26 g b) SULPHUR molecule, `S_8` Molar mass of Sulphur molecule, `S_8 = 8 xx 32 = 256 g` c) Phosphorus MOLECULS, `P_4` Molar mass of phosphorus molecule, `P_4 = 4 xx 31` `=124` g d) Hydrochloric acid , HCl Molar mass of hydrochloric acid HCl = 1+ 35.5 =36.5 g Nitric acid, `HNO_3` Molar mass of Nitric acid, `HNO_3 = 1+14 + 3xx16=63` g