Determine the pH of a 0.05 m solution of hydrocyanic acid (HCN). Hydrocyanic acid has an acid-dissociation constant of 4.9 • 10 -10

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?

Calculate the number of grams of sodium in 3.00 g of each sodium-containing food additive.