Chemistry, 03.07.2019 17:30 IsabellaGracie
(will mark brainliest! ) a fictitious element x is composed of 70.0 percent of the isotope x^55, 20.0 percent of the isotope x^ 56, and 10.0 percent of the isotope x^57. calculate the weighted atomic mass of element x to the nearest tenth. you must show all of your work to earn credit.
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Identify two types of chemical bonding in the source of dietary potassium
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Chemistry, 22.06.2019 13:00
6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.
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Chemistry, 22.06.2019 14:00
The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
Answers: 3
(will mark brainliest! ) a fictitious element x is composed of 70.0 percent of the isotope x^55, 20...
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