Harmful bacteria not remover by ealier steps in water purification are finally destroyed during what?

What mass of oxygen reacts with 3.6 g of magnesium to form magnesium oxide?

The maximum amounts of lead and copper allowed in drinking water are 0.015 mg/kg for lead and 1.3 mg/kg for copper. Tell the maximum amount of copper (in grams) allowed in 100 g of water.

Molality of 150. g H2SO4 solute dissolved into 900. g H2O solvent.

Red light has a wavelength of about 7*10-7 m. will exposure to red light cause electrons to be emitted from cesium?

A 50 gram sample of a radioisotope undergoes 2 half-lives. How many grams would remain at the end? Explain.

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?

Which one of the following Acids is most likely to hurt you? Acid A: 1.0 M; Acid B: 0.0001M

Which statement accurately describes the atoms of a specific element? explain your answer in complete sentences. A. A Neon, Ne, atom contains 10 electrons outside the nucleus and 11 neutrons inside the nucleus. OR B.

What is the volume of 2.00 moles of chlorine (cl2) gas at stp, to the nearest tenth of a liter?