The pressure of a gas at constant temperature is increased by a factor od 4. By what factor does the volume change?

A 1/4

B 1/2

C 1

D 4

If the atomic number of an element is 6 and its mass number is 20, how many neutrons are in the atom's nucleus?

What conversion factor would you use to convert correctly from the mass of a given substance to the number of moles of the given substance?

How many hydrogen bonds can CH3NH2 make to water?

Explain the similarities and differences between a 1M solution of NaOH and a 1m solution of NaOH (notice the M and m)

Ionic compound of GaTe

How many moles of neon (Ne, 20.179 g/mol) are in 68.4 grams of neon

A 50.00 mL sample of groundwater is titrated with 0.0300 M EDTA. Of 12.40 mL of EDTA is required to titrate the 50.00 mL sample, what is the hardness of the groundwater in molarity and in parts per million of CaCO 3 by mass

Why openness is important to the progress of science?

At a certain temperature the rate of this reaction is second order in NH4OH with a rate constant of 34.1 M^-1s^-1: Suppose a vessel contains NH4OH at a concentration of 0.100M.

If you go into the lab and dissolve 2.11 g of magnesium chloride in enough water to make 1500 ml of solution, what is the molarity of the resulting solution?