6.8 kg of Water at 78 c is mixed with 4.2 kg of Ethyl alcohol at 35 c. The specific heat of water is 4,186 j/kg c. The specific heat of Ethyl alcohol is 2,500 j/kg c. Determine the final equilibrium temperature that will be reached.

Which of the following statements about acidic water is true? a. acid has no effect on the h,o molecules. b. the solution contains a larger number of oh ions than h,o ions. c. the solution contains a larger number of h,o ions than qh ions. d. the solution contains an equal number of h,o ions and oh ions. none of the above e.

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.)

What best discribes the relationship between wavelength and frequency in a electromagnetic wave