Kim found that 10.0 mL of a 0.50 M NaOH solution are required to completely titrate 25,0 mL of HCl solution. What is
the concentration of the HCl?

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .