Explain the energy transformation that must occur for your body to participate in a physical activity, such as playing a sport.

A turbine operates on superheated steam that enters at 80 bar absolute and 500˚C, and leaves the turbine at 7.5 bar absolute and 250˚C. The flow rate of the steam is 400 kg/min and the turbine operates adiabatically.

An aqueous solution is 36% by mass silver nitrate, AgNO3, and has a density of 1.41 g/mL. What is the molality of silver nitrate in the solution?

How many electrons does oxygen have in its 2nd energy level?

When solid mercury (ii) nitrate is heated, it decomposes to form solid mercury (ii) oxide, gaseous nitrogen dioxide, and oxygen?

How much total energy must be absorbed by a 150 g sample of ice at 0.0°C that it melts AND then warms to 25.0°C? (Break it into steps and add them together, phase change and temperature change)

What is the relationship between chemical equilibrium and the rates of forward and reverse reaction

What is the valence of Fluorine

When liquid helium is exposed to room temperature, it forms a gas. Which best explains why this happens? The liquid helium absorbs energy from the air in the room. The particles in the air absorb the energy of the liquid helium.

Why was Bohr's model considered more accurate than Dalton's model?

Select the statements that correctly describe a buffer. 1) The pH of a buffer solution does not change significantly when any amount of a strong acid is added. 2) A buffer is generally made up of a weak acid and its conjugate base.