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Chemistry, 23.06.2019 06:20
Why is it that 85.48 rounded to two significant figures is 85 and not 86?
Answers: 1
Chemistry, 23.06.2019 08:30
Of element x has 22 protons, how many electrons does it have
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Chemistry, 23.06.2019 16:50
An element x has two isotopes. x–15 has 7 protons and 8 neutrons. determine the atomic number and mass number of the second isotope, which has 10 neutrons in its nucleus.
Answers: 1
Find the average mass of 3 atoms of C-12 and 1 atom of C-13 by adding up their masses and dividing b...
Mathematics, 18.12.2019 02:31