Chemistry, 20.10.2020 14:01 whocares1234
1.00 l sample of polluted water was analysed for lead(II) ions, , by
adding an excess of sodium sulfate to it. The mass of lead(II) sulfate
that precipitated out was 229.8 mg. Calculate the concentration of lead
(II) ions in mg l -1 present in the initial sample of polluted water.
Answers: 1
Chemistry, 22.06.2019 12:00
An atom's configuration based on its number of electrons ends at 3p4. another atom has seven more electrons. starting at 3p, what is the remaining configuration? 3p63d34s2 3p43d54s2 3p64s23d3 3p44s23d
Answers: 3
Chemistry, 22.06.2019 17:40
Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.
Answers: 1
Chemistry, 23.06.2019 00:00
This statement about matter and its behavior is best classified as a
Answers: 1
Chemistry, 23.06.2019 11:00
Which example is a mechanical wave? a.microwave b.radio wave c.water wave d.ultraviolet light
Answers: 1
1.00 l sample of polluted water was analysed for lead(II) ions, , by
adding an excess of sodium sul...
History, 26.03.2020 17:47
History, 26.03.2020 17:47
Social Studies, 26.03.2020 17:48
Mathematics, 26.03.2020 17:48
Mathematics, 26.03.2020 17:48
Mathematics, 26.03.2020 17:48
Mathematics, 26.03.2020 17:48
Mathematics, 26.03.2020 17:48
Mathematics, 26.03.2020 17:48
Mathematics, 26.03.2020 17:48