What is the pH of a solution with [н'] = 7.0 x 107?

А. 6.15

В. б. 15

с. 7.00

D. 8.45

Whats the defenition of elements? I know what it means but I cant explain it lol

Calculate the mass of MgCO3 precipitated by mixing 10.00 mL of a 0.200 M Na2CO3 solution with 5.00 mL of a 0.0450 M Mg (NO3) 2 solution.

10.0g of calcium carbonate was heated. The mass of calcium oxide left was 5.6g. Calculate the mass of carbon dioxide produced in the reaction.

Al + Fe2O3 → Al2O3 + Fe (Need to balance equation) How many grams of Fe can be produced when 10.0g of Al is reacted with an excess (unlimited) supply of Fe2O3?

An atom in the ground state has two electrons in its first shell and six electrons in its second shell. What is the total number of protons in the nucleus of this atom? (1) 5 (2) 2 (3) 7 (4) 8

Nonmetal oxides can react with water to form acids. For example, carbon dioxide reacts with water to form carbonic acid: CO2 H2O H2CO3. (1) Write an equation to show how diiodine pentaoxide reacts with water to form an acid. Do not include states.

If atmospheric pressure suddenly changes from 1.00 atm to 0.892 atm at 298 k, how much oxygen will be released from 4.40 l of water in an unsealed container?

Determine the molecular formula for the unknown if the molecular mass is 60.0 amu and the empirical formula is ch2o.

Draw the organic product of the following nucleophilic reaction

How does the energy of the activated complex compare with the energies of reactants and products? select one: a. it is lower than the energy of both reactants and products. b.