Chemistry, 05.08.2021 14:00 twistedhyperboles
Cho 127,5 gam hỗn hợp muối NaCl và Na2CO3 vào dd Ba (NO3)2 vừa đủ. Sau phản ứng thu được 73,875 gam chất kết tủa. Tính khối lượng dung dịch muối thu được sau phản ứng và tính thành phần % theo khối lượng của mỗi muối trong hỗn hợp ban đầu
Answers: 3
Chemistry, 21.06.2019 18:00
Acylinder is filled with 2.00 moles of nitrogen, 3.00 moles of argon and 5.00 moles of helium. if the gas mixture is at stp, what is the partial pressure of the argon
Answers: 1
Chemistry, 22.06.2019 18:00
How many moles of oxygen gas are produced from the decomposition of six moles of potassium
Answers: 1
Chemistry, 22.06.2019 19:30
Which liquid (h2o, h2o + soap, or h2o + salt) has the strongest cohesion and adhesion? (need now plz)
Answers: 1
Chemistry, 22.06.2019 21:40
Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.
Answers: 2
Cho 127,5 gam hỗn hợp muối NaCl và Na2CO3 vào dd Ba (NO3)2 vừa đủ. Sau phản ứng thu được 73,875 gam...
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