Which of the following is a characteristic of a mixture? a. it has varying properties. b. it has a fixed composition. c. it only contains pure substances. d. it has both varying properties and a fixed composition?

True or false graphs must include scales that increase by the same amount

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.

What structural formula represents 4 electrons shared between two atoms?