In which case would recalibrating a thermometer be an important next step in an experiment dealing with boiling points? A. The results of several trials are all very close to each other, but they are noticeably different from the accepted value for the boiling point.

B. A small number of trials are conducted, with results quite different from each other, and with an average that is noticeably different from the accepted value.

C. The results of several trials vary by a large amount, but the average is close to the accepted value for the boiling point.

D. A single trial is conducted, and the result is very close to the accepted value of the boiling point.

And also if anyone knows the answers to the Unit 9 Lesson 2 Chemistry A Semester Exam from Connexus, I would appreciate any help.

i think it's c. i'm not sure but i think so.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.