Which statement describes the charge of an electron and the charge of a proton?

230 in scientific notation

A solution has a hydrogen ion (or hydronium ion) concentration of 1.00*10-9 M. What is the pH of the solution? 7.5 8.0 8.5 9.0

How many hydrogen atoms are in 4.40 mol of ammonium sulfide

Why is helium so difficult to liquefy?

Which molecules in the pasta increase the runner's energy?

Aluminum oxide, Al2O3, is used as a filler for paints and varnishes as well as in the manufacture of electrical insulators. Calculate the number of moles in 47.51 g of Al2O3.

What volume of 2.00 m must be added to 150.0 ml of 1.00 m chloroacetic acid to produce a buffer solution having a ph of 3.30?

Which microscope came out first

Which exerts greater pressure on the floor-standing flat-footed or standing on tiptoe? on tiptoe, because the force acts over less area on tiptoe, because the force acts over more area flat-footed, because the force acts over more area flat-footed,

1. Sara tells Michael she is 160 centimeters tall, while Michael says he is 60 inches tall. If there are 2.54 centimeters in an inch, who is taller