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

A hurricanes energy comes from

Write the principle and applications of the following processes; 1. Chromatography 2. Centrifugation

In acidic solution, the sulfate ion can be used to react with a number of metal ions. One such reaction is SO42 - (aq) Sn2 (aq) →H2SO3 (aq) Sn4 (aq) Since this reaction takes place in acidic solution, H2O (l) and H (aq) will be involved in the

A stock solution with a concentration of 6.53 M is used to make 250 mL of a 1.38 M solution. How many milliliters of stock solution will you need?

How to know whats a strong acid and whats a weak acid?

Does a mole of hydrogen have the same mass as a mole of oxygen? explain your answer.

A 0.500-L sample of H₂SO₄ solution was analyzed by taking a 100.0mL aliquot and adding mL of. After the reaction occurred, an excess of ions remained in the solution. The excess base required mL of for neutralization.

Ammonia can be prepared by the reaction of magnesium nitride with water. The products are ammonia and magnesium hydroxide. Write and balance the equation.

Which period is the shortest in the long form of the periodic table? Name all the elements in this period.

A mole of gas at 0.0oC and 760. torr occupies 22.4 L. What is the volume of this gas at 25. oC and 760. torr