322 l of hydrogen occupies volume of 197 l at stp. what was the initial pressure exerted on the hydrogen constant

Give the number of significant figures in this number: 7.8 x 10¹²

Identify the following as a cation or an anion, and determine the charge on each: A lithium ion with 3 protons and 2 electrons.

What formula represents the combined gas law

32P can be used to make any nucleotide (A, C, G, or T) radioactive. Which of the following explains why this is true? A. All nitrogenous bases have a phosphorus atom that can be replaced with 32P. B.

The water in a 150-mL flask is poured into a beaker that contains 600 mL of ethyl alcohol. Which substance is the solvent in this mixture?

Of the total base sequence in human DNA, what percentage codes for proteins? A) Nearly 50 percent B) About 5 percent C) About 90 percent D) 100 percent

When an atom of phosphorus becomes a phosphide ion (P3-), the radius decreases, increases or stays the same?

Determine the percentage composition (by mass) of oxygen in NH4NO3.

Why does aluminum have a higher specific heat than gold?

The frequency of a given region of the electromagnetic spectrum is more than 3 x 1019 HZ. Note that the speed of light is 2.998 x 108 m/s. Which waves are found in this region? A. gamma rays B. visible light C. microwaves D. radio waves E. x-rays