
Concept explainers
Interpretation:
The reason the development of separation techniques and methods of chemical analysis was necessary before the formulation of the laws of definite composition and multiple proportions is to be determined.
Concept introduction:
Law of definite composition states that the composition of a particular compound is the same no matter what the source of the compound is. A compound has the same elements in the same proportion by mass.
Law of multiple proportion states that, if two elements can combine to form more than one compound, the masses of one element that combines with a fixed mass of the other element are in the ratio of small whole numbers.

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Chapter 2 Solutions
Chemistry: The Molecular Nature of Matter and Change
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- What the best source of sulfide to use on a small scale in the lab? Group of answer choices thiourea H2S NaHS Na2Sarrow_forwardWhich of the following statements about sulfur is FALSE? Group of answer choices H2S is the product of an oxygen-depleted ecosystem. In the acid mine drainage reaction, FeS2 is a product. One allotrope of sulfur has the formula S20. In the environment, bacterial oxidation can convert S2− to elemental S or SO42−.arrow_forwardOf the following choices, which is the best reason that most materials DON'T spontaneously combust even though our atmosphere is about 21% oxygen? Group of answer choices The reduction of O2 in the gas phase (O2 + e− → O2−) is spontaneous. The reduction of O2 in acid solution (O2 + H+ + e− → HO2(aq)) is spontaneous. O2 is not a reactant in combustion. The O2 bond dissociation energy is 494 kJ/mol, leading to a high activation energy for combustion.arrow_forward
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