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Mole Concept and Stoichiometry Summary
> specified particles. Molar mass refers to mass of one mole particles of the substance. One a.m.u. = 1 / (6.023 x 10 2 3 ) g Empirical formula is the formula, which gives the simplest whole number ratio of atoms of different elements present in the molecule of the compound. Molecular formula = Emp..
Mrs. Alice, a Martian woman, was shocked when she checked her weight o..
Mrs. Alice, a Martian woman, was shocked when she checked her weight on the Earth. The weighing scale showed that she weighed 130 lb. What is her weight on the Mars? (Hint: 100 lb on the Earth is equivalent to 38 lb on the Mars.) => 53.9 lb or 51.6 lb or 49.4 lb or 47...
Law of Reciprocal Proportions or Law of Equivalent Proportions
This law was proposed by Ritcher in 1792. It states that 'when two different elements combine separately with the same weight of a third element, the ratio of the masses in which they do so will be the same or some simple multiple of the mass ratio in which they combine with each other'...
This law was proposed by Ritcher in 1792. It states that 'when two different elements combine separately with the same weight of a third element, the ratio of the masses in which they do so will be the same or some simple multiple of the mass ratio in which they combine with each other'...One pound of body fat is equal to 3500 calories. In order to lose 1 po..
One pound of body fat is equal to 3500 calories. In order to lose 1 pound of weight we should walk for 15.2 hours. Convert the decimal into equivalent fraction. => 15 2 / 5 hours or 15 1 / 6 hours or 15 1 / 5 hours or 14 2 / 5 hours..
06.
A piece of metal weighting 200 g is to be electroplated with 5% of its weight in gold. If the strength of the available current is 2 ampere, how long would it take to deposit the required amount of gold? Given: Electrochemical equivalent of hydrogen = 0.1044 x 10 - 4..
Calculations
Let the mass of platinic chloride salt be = W g The mass of platinum residue left = x g From the molar stoichiometry, Number of mol of B 2 H 2 PtCl 6 = Number of mol of Pt Or If E is the equivalent mass of the organic base, Then molecular mass of the salt (B 2 H 2 PtCl 6 ) =..
Faraday's Laws of Electrolysis
First law states that the mass of a substance deposited or liberated on an electrode during electrolysis is proportional to the total quantity of electric charge passed through the electrolyte. Second law states that if same quantity of charge is passed through several electrolytes, the mass o..
First law states that the mass of a substance deposited or liberated on an electrode during electrolysis is proportional to the total quantity of electric charge passed through the electrolyte. Second law states that if same quantity of charge is passed through several electrolytes, the mass o..2nd Law
When the same quantity of electricity is passed through different electrolytes connected in series the weight of substances deposited at the electrodes is directly proportional to their equivalent weight. Example: If CuSO 4 and ZnSO 4 solutions are connected in seri..
Normality
Normality - Normality is defined as the number of gram equivalents of solute present per litre (dm 3 ) of the solution at any given temperature. It is expressed as N. In terms of weight, Normality of the substance can be expressed a..
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