Germanium is classified as a
(1) metal (3) nonmetal
(2) metalloid (4) noble gas...
Chemistry, 28.09.2019 09:30 fluffy374747
Germanium is classified as a
(1) metal (3) nonmetal
(2) metalloid (4) noble gas
Answers: 1
Chemistry, 22.06.2019 06:30, coreyslotte
Use examples from the article to explain one positive and one negative effect that chemistry has had on society.
Answers: 2
Chemistry, 22.06.2019 13:00, rome58
Lab reagent, hypothesis test. a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl. these six measurements are assumed to be an srs of all possible measurements from solution. they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution. carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.
Answers: 1
Chemistry, 22.06.2019 21:40, k3rbycalilung
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
Mathematics, 13.01.2021 20:10
Mathematics, 13.01.2021 20:10
Mathematics, 13.01.2021 20:10
Mathematics, 13.01.2021 20:10