Chemistry

Chemistry, 10.07.2019 01:30, xoohaleey

Manganese makes up 1.3 × 10–4 percent by mass of the elements found in a normal healthy body. how many grams of manganese would be found in the body of a person weighing 196 lb? (2.205 lb = 1 kg) 56 g

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Chemistry, 03.08.2019 00:30, trinigal83

The useful metal manganese can be extracted from the mineral rhodochrosite by a two-step in the first step, manganese(ii) carbonate and oxygen react to form manganese(iv) oxide and carbon dioxide: 2mnco3 + o2=2mno2 + 2co2in the second step, manganese(iv) oxide and aluminum react to form manganese and aluminum oxidide: 3mno2 + 4al = 3mn + 2al2o3 suppose the yield of the first step is 65.% and the yield of the second step is 80.%. calculate the mass of manganese(ii) carbonate required to make 8.0kg of manganese. be sure your answer has a unit symbol, if needed, and is rounded to 2 significant digits.

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Chemistry, 13.08.2019 00:20, romanlittlewood

The natural abundances of elements in the human body, expressed as percent by mass, are oxygen (o), 65 percent; carbon (c), 18 percent; hydrogen (h), 10 percent; nitrogen (n), 3 percent; calcium (ca), 1.6 percent; phosphorus(p), 1.2 percent; all other elements, 1.2 percent. calculate the mass in grams of each element in the body of a 62-kg person.

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Chemistry, 19.09.2019 02:30, dcox5057

The natural abundances of elements in the human body, expressed as percent by mass, are: oxygen (o),65 percent; carbon (c), 18 percent; hydrogen (h), 10 percent; nitrogen (n), 3 percent; calcium (ca), 1.6 percent; phosphorus (p), 1.2 percent; all other elements, 1.2 percent. calculate the mass in grams of each element in the body of a 62-kg person.

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Chemistry, 23.10.2019 20:00, wronganswer1026

Student determines the manganese(ii) content of a solution by first precipitating it as manganese(ii) hydroxide, and then decomposing the hydroxide to manganese(ii) oxide by heating. how many grams of manganese(ii) oxide should the student obtain if his solution contains 54.0 ml of 0.491 m manganese(ii) nitrate?

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Manganese makes up 1.3 × 10–4 percent by mass of the elements found in a normal healthy body. how ma...

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