Chemistry, 23.10.2019 19:00 joelpimentel
What is the atomic weight of calcium with the following isotopes?
calcium-40 (96.941%)
calcium-42 (0.973%)
calcium-44 (2.086%)
Answers: 1
Chemistry, 21.06.2019 15:40
Describe in detail the melting point behavior of the 80: 20 benzoic acid-mandelic acid mixture
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Chemistry, 22.06.2019 04:00
Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?
Answers: 3
Chemistry, 22.06.2019 18:50
Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g. what is the percent by mass of water in the hydrate? %
Answers: 1
Chemistry, 22.06.2019 22:30
Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.
Answers: 1
What is the atomic weight of calcium with the following isotopes?
calcium-40 (96.941%)<...
calcium-40 (96.941%)<...
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