Chemistry, 24.09.2021 21:10 angelinailiff8531

How many atoms of hydrogen and oxygen are there in 9 gram of water ?

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Chemistry, 22.06.2019 01:20, sarinaneedshelp01

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Chemistry, 22.06.2019 02:20, dgadam7495

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .

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Chemistry, 22.06.2019 08:00, stephstewart1209

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

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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.