PLEASE HELP QUICKLY!! You have performed a titration on a 15.00 mL sample of HCl. To reach the endpoint of the titration, you added 21.78 mL of 0.130 M NaOH. The products of this reaction are salt and water. What was the concentration (in M) of HCl in the sample?

How much heat is released upon converting one mole of steam (18.0 g) from 100.0 ∘c to water at 25.0 ∘c? show work and constants, trying to figure out how it works. only given the heat capacity for steam and water so try to only use that

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

How many miles of water are produced if 5.43 mol pbo2 are consumed