Chemistry, 20.05.2021 05:40 paolaf3475
854-2087-5854 QQR5zb A n y b o y s C o m e t o m y z o o m
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Chemistry, 21.06.2019 18:30
Asample of the male sex hormone testosterone, c19h28o2, contains 3.88Ć10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?
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Chemistry, 22.06.2019 19:00
How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next
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Chemistry, 22.06.2019 21:00
The rate constant for the reaction below is 6.2 x 10ā5 mol lā1 s ā1. if the initial concentration of a is 0.0500 m, what is its concentration after 115 s?
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Chemistry, 23.06.2019 01:30
Which conclusion fits the data in the table? a. heat chemically changes chocolate and margarine. b. all solids become liquid at 100Ā°f. c. removing heat from a substance it to melt. d. matter may change shape when it is heated.
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