A chemist prepares a solution of nickel(II) chloride NICl2 by measuring out 315 umol of nickel(II) chloride into a 500ml volumetric flask and filling the flask to the mark with water. Calculate the concentration in umol of the chemist's nickel(II) chloride solution. Round your answer to 3 significant digits.

Chlorine and water react to form hydrogen chloride and oxygen, like this: 2cl2 (g) + 2h2o (g) → 4hcl (g) + o2 (g) also, a chemist finds that at a certain temperature the equilibrium mixture of chlorine, water, hydrogen chloride, and oxygen has the following composition: compound concentration at equilibrium cl2 0.55m h2o 0.57m hcl 0.53m o2 0.34m calculate the value of the equilibrium constant kc for this reaction. round your answer to 2 significant digits.

Two nails have identical sizes and shapes. in one nail, 20 percent of the domains are lined up. in the other nail, 80 percent of the domains are lined up. which has stronger magnetic force? first answer gets brainliest!

Scuba divers use tanks of compressed air to them breathe. gases can be compressed because?