Discover Questions

Prove sin2A*cos2A = sin2A-4sin^3A*cosA ? CHEM HELP!!!! How many moles are present in 0.260 L of hydrogen gas at 43.2 °C and 735 Torr? Assume ideal behavior.? Forgot to write down my observations but for all those chemists out there, what is the color of a 0.1 M K2C2O4 solution? Fill in the blank:
Am I - enough? (2x^3)+(ax^2)+(bx)-(3) divided by (x-1) and (x-2) the remainders are 8 and 7. Find a and b.?