The elements in groups 3-12 are known as:
a. the transition elements.
b. the halogens...
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Chemistry, 22.06.2019 01:30
(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?
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Chemistry, 22.06.2019 17:00
Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.
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Chemistry, 23.06.2019 01:00
Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas
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