In the laboratory a student combines 37.0 mL of a 0.231 M potassium carbonate solution with 18.7 mL of a 0.614 M sodium carbonate solution. What is the final concentration of carbonate anion ?

Calcium hydride (cah2) reacts with water to form hydrogen gas: cah2(s) + 2h2o(l) → ca(oh)2(aq) + 2h2(g) how many grams of cah2 are needed to generate 45.0 l of h2 gas at a pressure of 0.995 atm and a temperature of 32 °c?

What is the mass of 0.46 mol of mgcl2

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123