Chemistry

Chemistry, 23.08.2019 01:00, kharmaculpepper

How many moles of calcium are in a sample of 40g?

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Chemistry, 23.09.2019 13:30, jennieogar20

Asample of calcium is analysed in a mass spectromet that the sample contains just two isotope of the calcium in the sample is 40.48. the sample contains 94.0 a calculate the isotopic mass of the other ca all your working. mass spectrometer. it has been determined calcium. the relative atomic mass he sample contains 94.0% of calcium-40. pic mass of the other calcium isotope in the sample. show

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Chemistry, 06.11.2019 10:31, toxsicity

1.a sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium. how much calcium is contained in 40.0 g of calcium fluoride? 2.silver has two isotopes. one isotope contains 60 neutrons and has a percent abundance of 51.839% the other contains 62 neutrons. give the atomic symbols for the two isotopes.3.what is the average atomic weight of silver? what is the mass (in grams) of a single chlorine molecule? 4.how many moles of ethanol (ch_3ch_2oh) are in 141 mg?

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