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Chemistry, 22.06.2019 09:00
Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.
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Chemistry, 22.06.2019 16:30
How many grams of mgbr2 are needed to produce 75g or metal?
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Chemistry, 22.06.2019 23:00
What element has similar physical and chemical properties as boron.
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Chemistry, 22.06.2019 23:30
The sum of the oxidation numbers in a neutral compound is always
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