Larry L.

A 0.250 g sample of the weak acid HA (molar mass = 150.0 g/mol) is dissolved in 50.0 g of water. The freezing point of the resulting solution is -0.071 °C. Calculate the value of Ka for this acid.... more

In the coordinate plane, which of the following functions rotates a point, (x, y), 90° counterclockwise about the point (1, 0)?A. T(x,y)=(1−y,x−1)B. T(x,y)=(y+1,1−x)C. T(x,y)=(x+1,y)D. T(x,y)=(1−y,x)

When an automobile moves with constant velocity, the power developed is used to overcome the frictional forces exerted by the air and the road. If the engine develops 30 hp, what total frictional... more

A firefighter, whose mass (including clothing and equipment) is m = 85 kg, hears the alarm and slides down the pole with a constant downward acceleration of magnitude a = 3.23 m/s^2.Answer in terms... more

A 82 kg baseball player, running at 3.5 m/s, slides into first base. If the coefficient of kinetic friction is 0.40, how far does the player slide?

Assuming the complete precipitation, calculate the final concentration pf each ion. If the ion is no longer in solution, enter a 0 for the concentration.

A beaker contains a solution of 0.0200 M MnO4 – and 0.00500 M Mn2+ at a pH of 0.0. A second beaker contains 0.150 M Fe2+ and 0.00150 M Fe3+. A salt bridge connects the two beakers, and Pt... more

How many J of energy would it take to break a single aluminum-27 nucleus (26.9815386 amu) into its component neutrons (1.008664916 amu) and protons (1.007276467 amu)? (Express your answer to the... more