15.9g. of copper sulphate and 10.6g of sodium carbonate react together to give 14.2g of sodium sulphate and 12.3g of copper carbonate. Which law of chemical combination is obeyed? How? (AS-1)
Analysis of 30g of a compound D was found to contain 10g off element A and 20g of element B. again analysis of 45g of another compound E was found to contain 15g of element B and 30g of element C. caculate the amounts of D and E formed if 15g of A, 60g of B and 15g of C are mixed together and allowed to react with each other. also calculate total mass of the mixture after completion of the reaction. assume that no other reaction is possible except the reaction of B with A and C separately. state which laws of the chemical combination can be utilised in the calculation.
9.7g of hydrated copper sulphate on heating loses 3.5 g of water. What is the percentage of water of crystallization?
How many gram of carbon is to be burnt to produce 33g of CO_(2) ?
When 2 A current was passed for 1h through a copper sulphate solution, 2.369 g of copper was discharged. Find the atomic weight of copper.
0.2964 g of copper is deposited, when 0.5 A current is passed through copper sulphate solution for 30 min. What is the electrochemical equivalent of copper?
2g of metal carbonate is neutralised completely by 100 mL of 0.1 (N) HCl. The equivalent weight of metal carbon ate is-
Calculate the number of gram-atom present in 2.1g of nitrogne and 0.23 g of sodium.
What is the minimum volume of water requires to dissolve 1g of calcium sulphate at 298K ? (For calcium sulphate, K_(sp) is 9.1xx10^(-6) ).
What will be the pressure exerted by a mixture of 3.2g of methane and 4.4 g of carbon dioxide contained in a 9 dm^(3) flask at 27^(@)C ?
NCERT BANGLISH-ATOMS, MOLECULES AND CHEMICAL REACTIONS -Let us Improve our learning (Higher Order Thinking Questions )
