ms āakāsh chemistry classes
7276320001
01 Calculate the numbers of moles and molecules present in 0.32mg of methane?
02 Calculate the numbers of moles and molecules of sulphur di oxide obtained by combustion of 6.4 X
10-2 of sulphur ?
ms āakāsh chemistry classes
7276320001
03 Calculate the mass of one oxygen atom and oxygen molecule in kg.
04How many oxygen molecules are needed to synthesis 0.245gm of carbon di oxide by controlled
reaction with carbon?
ms āakāsh chemistry classes
7276320001
05 Calculate the numbers of moles and molecules and number of atom present in
01)1.1 X 10-4 kg of CO2 02) 5.6 cm3 of ammonia at STP 03)0.49 gm of helium
ms āakāsh chemistry classes
7276320001
Calculate the mass percentage of different constitunt element in urea .
A compound with molar mass 15 gm was found to contain 39.62% of Cu and 20.13% sulphur suggest
molecular formulae for the compound (Cu 63 S 32 O 16).
ms āakāsh chemistry classes
7276320001
Write the balanced chemical reaction between aqueous solution of ferric chloride and metallic zinc .
Write the balanced chemical reaction between iron and chlorine to form ferric chloride.
Calculate the mass of carbon di oxide and water formed on complete combustion of 24 gm of methane
gas.
ms āakāsh chemistry classes
7276320001
Calculate the number of moles of methane required to produce 66 gm of carbon di oxide gas on its
complete combustion .
3.49 gm of ammonia at STP occupies volume of 4.48 dm3 calcultae molar mass of ammonia
Calculate the mass of potassium chlorate required to liberate 6.72 dm3 of oxygen at STP molar mass of
potassium chlorate is 122g/mol
ms āakāsh chemistry classes
7276320001
Calculate the volume of oxygen required for complete combustion of 0.25 mole of methane at STP
Calculate the volume hydrogen of hydrogen required for complete hydrogenation of 0.25dm3 of ethyne
at STP
Calculate the number of moles and molecules of ammonia present in 5.6 dm3 of its volume
ms āakāsh chemistry classes
7276320001
Calculate number of atoms of hydrogen present in 5.6 gm of urea also calculate number of atoms N,C
and O
Calculate the number of atoms of C and O in 72.5gm of isopropanol.
Calculate mass percentage of H,P and O in phosphoric acid
ms āakāsh chemistry classes
7276320001
Calculate mass percentage compositon of elemnets in nitric acid
Analysis of vitamin C show that it contains 40.92%carbon by mass, 4.58%hydrogen and 54.50%oxgen
determine empherical formulae of vitamin C