Chemistry, 10.11.2019 04:31 stormmesa1
Even though we are well into the course dumbledore notices some of the students are still having trouble with significant figures. let’s review them once more: how many significant figures does the result of the following calculation have? (3.478-2.31)*(4.428-3.56)?
a) 1
b) 2
c) 3
d) 4
e) 5 2.
Answers: 3
Chemistry, 22.06.2019 04:00
You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present
Answers: 1
Chemistry, 22.06.2019 14:50
Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.
Answers: 1
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
Answers: 1
Even though we are well into the course dumbledore notices some of the students are still having tro...
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