Hi, if any one could answer any of the questions shown . pls help this is timed :(​

Which best describes why nh4+ can form an ionic bond with ci-?

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted

Essay-alternative energy sources research sources of energy that are being developed. write a report of 350-400 words discussing the information you learned concerning the development of various energy sources and the impact that you think they will have on your life. include sources cited at the end of your report using the mla format. follow the rubric guidelines. note that wikipedia is not an appropriate resource for a research paper. worth 99