What is the pH of solution if the concentration of [H3O+] = 0.000558?

3.25

7.45

5.58

1.00

Ineed ! i have no clue how to do this problem.

Which of the following describes a situation where competition between producers exists

Reacting masses1 calcium carbonate breaks down on heating to produce calcium oxide and carbondioxide gas.caco3 + cao + co2a student heats 15 g of calcium carbonate strongly in a crucible.relative atomic masses (a): ca = 40, c = 12, o = 16.calculate the mass of calcium oxide produced by this reaction.(5 marks)