Chemistry, 12.07.2019 03:30 deedeesmoke113057
(a) z = 8, number of neutrons = 9 (b) the isotope of chlorine in which a = 37 (c) z = 27, a = 60 (d) number of protons = 26, number of neutrons = 31 (e) the isotope of i with a mass number of 131 (f) z = 3, number of neutrons = 4 !
Answers: 1
Chemistry, 22.06.2019 00:00
Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.
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Chemistry, 22.06.2019 02:40
Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.
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Chemistry, 22.06.2019 12:10
Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.
Answers: 1
Chemistry, 22.06.2019 12:30
What is the percent composition of ca(oh)2? 37.7% ca, 53.0% o, and 10.3% h 45.5% ca, 38.2% o, and 16.3% h 54.0% ca, 43.0% o, and 2.7% h 64.7% ca, 27.0% o, and 8.3% h
Answers: 2
(a) z = 8, number of neutrons = 9 (b) the isotope of chlorine in which a = 37 (c) z = 27, a = 60...
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