Chemistry, 19.07.2019 21:00 kristieL50
1. which of the following metals oxidized by calcium ions? a- potassium b- zinc c- iron d- lead 2. the first electrochemical cell was invented by a- michael faraday b- alessandro volta c- james maxwell d- benjamin 3. why cant a lead storage battery be charged indefinitely? a- a direct current must pass through the cells b- the electrodes lose lead sulfate c- it is difficult to reverse the direction of current flow d- the electrolyte is too expensive 4. which electrode (anode or cathode) is designated as positive in an electrolytic cell? a- anode b- cathode c- both d- neither 5. what is the direction of electron flow in an electrolytic cell? a- from cathode to anode b- from anode to cathode c- in either direction d- there is no flow 6. what electrolyte can be used to electrolyze water? a-
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Chemistry, 21.06.2019 20:30, Kaylinne1181
This chart represents the melting point of several substance. what besy explains the high melting point of the salt?
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Chemistry, 22.06.2019 14:00, hammackkatelyn60
The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
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Chemistry, 22.06.2019 17:00, jazmine8194
Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease
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1. which of the following metals oxidized by calcium ions? a- potassium b- zinc c- iron d- lead 2....
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