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Chemistry, 21.06.2019 14:10
The rock in a lead ore deposit contains 89 % pbs by mass. how many kilograms of the rock must be processed to obtain 1.5 kg of pb?
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What three things determine the shape and size of a puddle when water is poured out onto a surface
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In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al oxidizing agent = reducing agent =
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As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit
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