How many atoms of phosphorus are in 9.20 mol of copper(ii) phosphate?

Which of the following is in the lanthanide family? a) uranium b) promethium c) silver d) gold

What causes the appearance of lines in a emission spectrum

Select the correct answer. why are scientific models important in the study of science? a. they always involve critical mathematical calculations. b. they scientists understand complex ideas and objects that aren’t easy to handle. c. they enable scientists to popularize their work in society. d. they are required when conducting any peer review process. e. they are necessary for turning a hypothesis into a law.