State two advantage and two disadvantage of crystalliz ation over evaporation as mean of collecting
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H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

How does carbon monoxide pose the greatest threat to humans? a. it can be produced by wood fires. b. it can be produced by home furnaces. c. it is produced by acid rain. d. it is produced by modern automobiles.

In order for a high temperature boiler or steam engine to produce superheated water, or steam: the heat source must be greater than 100°c the water must be permitted to evaporate quickly the system must be sealed and become pressurized above atmospheric pressure the vapor pressure must be kept below 760 mm(hg)