Chemistry, 02.08.2019 13:30 Ackussinglake63
Which statement describes a change that occurs during a chemical reaction? a. atoms in the original substances are changed into different atoms to make new substances. b. atoms in the original substances are arranged in a different way to make new substances. c. the atoms in a substance change their properties so they can become a new substance. d. the atoms in a substance start to move faster until they are no longer touching each other.
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Large crystals are formed when igneous rocks cool very slowly igneous rocks cool very quickly sedimentary rock is eroded metamorphic rocks change into igneous rock
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Chemistry, 23.06.2019 16:00
Challenge question: this question is worth 6 points. as you saw in problem 9 we can have species bound to a central metal ion. these species are called ligands. in the past we have assumed all the d orbitals in some species are degenerate; however, they often are not. sometimes the ligands bound to a central metal cation can split the d orbitals. that is, some of the d orbitals will be at a lower energy state than others. ligands that have the ability to cause this splitting are called strong field ligands, cnâ’ is an example of these. if this splitting in the d orbitals is great enough electrons will fill low lying orbitals, pairing with other electrons in a given orbital, before filling higher energy orbitals. in question 7 we had fe2+, furthermore we found that there were a certain number (non-zero) of unpaired electrons. consider now fe(cn)6 4â’: here we also have fe2+, but in this case all the electrons are paired, yielding a diamagnetic species. how can you explain this?
Answers: 2
Which statement describes a change that occurs during a chemical reaction? a. atoms in the original...
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