भारत व बस्तर

Chapter 1 :   Basic Concepts of Chemistry   :- 1.  Calculate mass in grams of  a)  An atom of Sulphur.  b)  A molecule of H2O . 2.  How are 0.50 mol Na2CO3 and 0.50 M Na2CO3 different. 3.  What is law of multiple proportion ?  4.  Calculate the molecular formula of an oxide of Fe contain 69.9g and 30.1g of Fe and O respectively in percentage mass.  ( Molar mass of oxide = 159.8 g/mol and Fe = 55.85 ,   O = 16.00  ) 5.  What Will be mass of 01 Mole NaCl and  02 Mole of H²O.  6. Law of Definite Proportion. 7. What is average atomic Mass and atomic Mass Unit .     Explain Avagadro number. 8. In three moles of ethane ( C2 H6) . Calculate number of moles of carbon atoms and hydrogen atoms . 9. Calculate the molecular formula of an oxide of iron contains 69.9 g and 30.1 gram of fe and o respectively in mass percentage. ( Molar mass of Oxide = 159.8g/mol and Atomic mass Fe = 55.8 and O...