PLEASE HELP
In which of the following ionic compounds are ions with a +1 charge present?
a. Li2Se b. Al2Te3
c. Mg2Si d. SrO

In this reaction n2o4(g)→2no2(g) what changes in color would you expect as pressure is increased at a constant temperature

Joseph has hypothesized that sound travels in waves. if he were following the scientific method, what should he do next? a. ask a question. b. test the hypothesis. c. study the results. d. tell other scientists about his hypothesis.

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?