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Chemistry, 22.06.2019 15:30
The identities of substances are the same before and after which type of change
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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, 22.06.2019 20:30
Which of the following is not true about the atomic model of substances?
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Chemistry, 23.06.2019 15:00
Use the periodic table to identify the number of core electrons and the number of valence electrons in each case below. potassium (k): 1s22s22p63s23p64s1
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Mathematics, 24.06.2019 20:50
Spanish, 24.06.2019 20:50
Biology, 24.06.2019 20:50
Mathematics, 24.06.2019 20:50
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