The following list contains some common polyatomic ions. Using the charge on these ions and the idea of valence, predict the formulas for the compound formed from the following:

nitrate NO3-1 phosphate PO4-3
sulfate SO4-2 acetate C2H3O2-1
ammonium NH4+1 chromate CrO4-2
carbonate CO3-2 dichromate Cr2O7-2
permanganate MnO4-1 sulfite SO3-2
ammonium and sulfite

A. (NH 4) 2SO 3
B. NH 4SO 4
C. (NH 4) 2SO 4
D. NH 4SO 3

Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally

Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet