Chemistry, 12.08.2019 17:10 FatCatcreator
As stated in the text, convincing examples that demonstrate the law of conservation of matter outside of the laboratory are few and far between. indicate whether the mass would increase, decrease, or stay the same for the following scenarios where chemical reactions take place:
(a) exactly one pound of bread dough is placed in a baking tin. the dough is cooked in an oven at 350 fahrenheit realeasing a wounderful aroma of freshly baked bread during the cooking process. is the mass of the baked loaf less than, greater than, or the same as the one pound of original dough? explain.
(b) when magnesium burn in air a white glaky ash of magnesium oxide is produced. is the mass of magnesium oxide less than, greater than, or the same as the original piece of magnesium? explain.
(c) antoine lavoisier, the french scientist credited with first stating the law of conservation of matter, heated a mixture of tin and air in a sealed flask to produce tin oxide. did the mass of the sealed flask and contents decrease, increase, or remain the same after the heating?
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Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:
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Chemistry, 23.06.2019 01:30
Which conclusion fits the data in the table? a. heat chemically changes chocolate and margarine. b. all solids become liquid at 100°f. c. removing heat from a substance it to melt. d. matter may change shape when it is heated.
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Chemistry, 23.06.2019 03:30
In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus.b) the number of neutrons it contains in its nucleus.c) the number of protons it has in a cloud around the nucleus.d) the number of neutrons it has in a cloud around the nucleus.e) the number of electrons it exchanges with its neighbors.
Answers: 1
As stated in the text, convincing examples that demonstrate the law of conservation of matter outsid...
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