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1) who many laws are there a) 1 b) 2 c) 3 d) 4 2) Mass can neither be created nor destroyed during a chemical reaction is the law of: a) Mass combination b) Multiple proportion c) Constant composition d) Reciprocal proportion 3) Mass can neither be created nor destroyed during a chemical reaction is the law of: a) Conservation of mass b) Multiple proportion c) Constant composition d) Reciprocal proportion 4) In which law H landolt experiment happened? a) Conservation of mass b) Multiple proportion c) Constant composition d) Reciprocal proportion 5) the law of_____________ states that mass is neither be created nor be destroyed during a chemical reaction a) Conservation of mass b) Multiple proportion c) Constant composition d) Reciprocal proportion 6) law of _______________states that different samples of the same compound always contain the same elements combined together in the same proportions by mass a) conservation of mass b) Multiple proportion c) Constant composition d) Reciprocal proportion 7) law of _______________states that if two elements to form more than one compounds, the masses of one one element that combine with a fixed mass of the other element are in the ratio of small whole numbers or simple multiple ratio a) conservation of mass b) Multiple proportion c) Constant composition d) Reciprocal proportion 8) law of _______________states that when two different elements separately combine with the fixed mass of third element, the proportions in which they combine with one another shal be either in the same ratio or some simple multiple of it a) conservation of mass b) Multiple proportion c) Constant composition d) Reciprocal proportion

ceemical comination FOR CLASS 9

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