Physics, 04.12.2020 21:30 babygirl10302015
Which is the best explanation for his results?
A. The heating changed some of the sample to gas, causing the mass to decrease without breaking down the sample. Therefore, the original sample is a compound.
B. The appearance stayed the same, showing that the sample was not broken down by heating. Therefore, the original substance is an element.
C . The mass decreased during heating and some of the impurities escaped. Therefore, the original substance is an element.
D. The chemical reaction with acid changed, showing that the sample was broken down by heating. Therefore, the original substance is a compound.
Answers: 3
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While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.
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Consider two regions of space containing a static electric field, region a and region b. in region a the equipotential lines are more closely spaced than those in region b. what can be said about the relative strength of the electric field in the two regions? a) the electric field in region a is stronger th
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Which is the best explanation for his results?
A. The heating changed some of the sample to gas, c...
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