Chemistry, 07.03.2021 14:00 sksksksksk1
specimens of copper (II) oxide produced by various method were reduced in a stream of carbon(II) oxide and on analysis gave the following results 1.60g of copper oxide A gave 1.25g of copper 2.05g of copper oxide B gave 1 .63g of copper 2.40g of copper oxide C give 1.91g of copper
Answers: 3
Chemistry, 21.06.2019 23:10
Which statement describes both homogeneous mixtures and heterogeneous mixtures?
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Which type of substance ionizes partially and gives off hydrogen ions when dissolved in water? a. strong acid b. strong base c. weak acid d. weak base
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Chemistry, 22.06.2019 11:00
When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.
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Chemistry, 22.06.2019 17:10
)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.
Answers: 1
specimens of copper (II) oxide produced by various method were reduced in a stream of carbon(II) oxi...
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