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Some Basic Concepts of Chemistry 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 X3Y 2 weighs 9 g, the atomic weights of X and are (a)40, 30 (b)60, 40 (c)20, 30 (d)30, 20 2.What is the mass of the precipitate formed when 50 mL of 16.9% solution of AgNO3 is m mixed with 50 mL of 5.8% NaCl solution? (Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5) (a)  3.5 g   (b) 7 g (c)  14 g   (d) 28 g 3.If Avogadro number NA, is changed from 6.022 × 1023 mol–1 to 6.022 × 1020 mol–1, this would change the mass of one mole of carbon the ratio of chemical species to each other in a balanced equation the ratio of elements to each other in a compound the definition of mass in units of grams. (2015) 4)The number of water molecules is maximum in a) 1.8 gram of water b) 18 gram of water C) 18 moles of water (d) 18 molecules of water. (2015) 5)A mixture of gases contai...

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 X3Y 2 weighs 9 g, the atomic weights of X and are (a) 40, 30 (b) 60, 40 (c) 20, 30 (d) 30, 20 (NEET-II 2016) What is the mass of the precipitate formed when 50 mL of 16.9% solution of AgNO3 is mixed with 50 mL of 5.8% NaCl solution? (Ag = 107.8, N = 14, O = 16, Na = 23, Cl = 35.5) (a)  3.5 g (b) 7 g (c)  14 g   (d) 28 g (2015) If Avogadro number NA, is changed from 6.022 × 1023 mol–1 to 6.022 × 1020 mol–1, this would change the mass of one mole of carbon the ratio of chemical species to each other in a balanced equation the ratio of elements to each other in a compound the definition of mass in units of grams. (2015) The number of water molecules is maximum in 1.8 gram of water 18 gram of water 18 moles of water (d)  18 molecules of water. (2015) A mixture of gases contains H2 and O2 gas...