Chemistry, 01.06.2021 05:40 tae8002001
Explain why an excited electron that changes more energy levels results in blue and violet fireworks, and why an excited electron that only changes few energy levels result in red and yellow fireworks
Answers: 2
Chemistry, 21.06.2019 19:30, angelinararr5783
Which answer lists the fundamental forces in order from strongest to weakest
Answers: 1
Chemistry, 22.06.2019 03:40, allyyzz
Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)
Answers: 3
Chemistry, 22.06.2019 12:30, AnastasiaJauregui
Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together
Answers: 1
Chemistry, 22.06.2019 13:00, naomicervero
Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table
Answers: 3
Explain why an excited electron that changes more energy levels results in blue and violet fireworks...
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