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➡️Watch the entire playlist for Class 11 Chemistry Some Basic Concepts of chemistry in Hindi:
Molarity is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per liters of a solution. It is also known as the molar concentration of a solution. The mole is the unit of measurement for amount of substance in the International System of Units. A mole of a substance or a mole of particles is defined as exactly 6.02214076×1023 particles, which may be atoms, molecules, ions, or electrons. In this video, we will cover:
1.Suppose the elements X and Y combine to form two compounds XY2 and X3Y2. When 0.1 mole of XY2 weighs 10 g and 0.05 mole of X3Y2 weighs 9 g, the atomic weights of X and Y are.
2.Dissolving 120g of urea (Mw=60) in 1000g of water gave a solution of density 1.12gmL−1. The molarity of solution is:
3.20.0 mg of a magnesium carbonate sample decomposes on heating to give carbon dioxide and 8.0 mg magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample? [Atomic weight of Mg=24]
4.1g of a carbonate (M2CO3) on treatment with excess HCl produces 0.01186 mole of CO2. The molar mass of M2CO3 in gmol−1 is
5.The total number of electrons present in 18mL of water is ……
6.50.0 kg of N2 and 10.0 kg of H2 are mixed to produce NH3. Calculate the NH3 formed. Identify the limiting reagent in the production of NH3 in this situation.
7.The percentage composition of carbon by mole in methane is:
8.Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040
9.Carbon and oxygen are known to form two compounds. The carbon content in one of these is 42.9% while in the other it is 27.3%. Show that this data is in agreement with the
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