Chemistry, 21.10.2020 03:01, iicekingmann

How do I measure water for a recipe?

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Chemistry, 21.06.2019 23:00, AbhiramAkella

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

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Chemistry, 22.06.2019 07:40, pillgiing

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Chemistry, 22.06.2019 13:00, arivalen

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Chemistry, 22.06.2019 19:20, evansh78

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?