Chalk is composed of calcium carbonate, CaCO3. A student does not have a balance but does have 3.00M hydrochloric acid, HCl. If the student finds that it takes 327 millimeters of the acid to react with the chalk, what was the mass of the chalk in grams?

CaCO3(s) + 2HCl(aq) ⟶ CaCl2(aq) + CO2(g) + H2O(I)

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.