Monty

The Concentration of Cu2+ ions in the water (which also contains sulfate ions) discharged from a certain industrial plant is determined by adding excess sodium sulfide(Na2S) solution to .800 L of the water. Molecular Equation: Na2S(aq) CuSO4(aq) --> Na2SO...

What volume of a .500 M HCl solution is needed to neutralize each of the following: 10 ml of a .300 M NaOH solution 10 mL of a .200 M Ba(OH)2 solution

Calculate the work done in joules when 1.0 mole of water vaporizes at 1.0 atm and 100C. Assume that the volume of liquid water is negligible compared with that of steam at 100c, and ideal gas behavior

Solve exactly for x: sin^3 x + sin x cos^2 x = cos x If 0 degrees <= x <= 180 degrees x = ? degrees? Would i factor out sin^3 x from the left side and the right. and try to solve from there?

i wrote it wrong the 1st time. this is the problem. solve: (3/x)-1=(7/x-20)

it suppose to be (3/x)-1=7/(x-20)

S^2- + Cu^2+ = CuS(s) .0177g CuS / molar mass CuS= Moles of CuS Moles of CuS= Moles of Cu Moles Cu/ Initial volume= Molarity of Cu

calculate the work done when 50.0g of tin dissolves in excess acid at 1.00 atm and 25 degrees c.

The above answer is wrong. (84000-45000) is not 28000, it is 39,000. Therefore 39000/3 is 13000. M =13000.

never mind disregard this. I found the answer to be 45 degrees

What is the answer?

Hm. Lemme see.