The atomic number of caesium is 55 and its atomic mass is 133. The nucleus…
The atomic number of caesium is 55 and its atomic mass is 133. The nucleus of caesium atom…
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Four elements P,Q, R and S have atomic numbers of 4, 10, 12 and 14…
Four elements P,Q, R and S have atomic numbers of 4, 10, 12 and 14 respectively . Which…
The atomic radius of Li, Na and K are 1: 33A, 1. 54A and 1….
The atomic radius of Li, Na and K are 1: 33A, 1. 54A and 1. 96A res pectively.…
Elements X and Y have electronic configurations 1s22s22p6 and 1s22s22p63s23p1 respectively. When they combine, the…
Elements X and Y have electronic configurations 1s22s22p6 and 1s22s22p63s23p1 respectively. When they combine, the formula of the…
The minimum volume of oxygen required for the complete combustion of a mixture of 10cm…
The minimum volume of oxygen required for the complete combustion of a mixture of 10cm 3 of CO…
What is the partial pressure of hydrogen gas collected over water at standard atmospheric pressure…
What is the partial pressure of hydrogen gas collected over water at standard atmospheric pressure and 25 oC…
The molar ratio of carbon to hydrogen of a volatile liquid compound is 1: 2….
The molar ratio of carbon to hydrogen of a volatile liquid compound is 1: 2. 0. 12 g…
20.00 cm 3 of a solution containing 0.53 g of anhydrous Na2CO3 in 100 cm3…
20.00 cm 3 of a solution containing 0.53 g of anhydrous Na2CO3 in 100 cm3 requires 25.00 cm3…
Pick out the correct statement
Pick out the correct statement A. Zin heated to redness reacts with steam to give oxygen and zinc…
Consider the following exothermic reaction 2SO2(g) + O2(g) = 2SO3 (g) . If the temperature…
Consider the following exothermic reaction 2SO2(g) + O2(g) = 2SO3 (g) . If the temperature of the reaction…