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What is the [H3O+] in a solution with [ OH- ] = 1 × 10-12 M?

According to LeChâtelier’s principle, predict whether adding causes the system to shift in the direction of reactants, products, or no change. Addition of NH3(aq) NH4+(aq) + H2O(l)

What is the pH of a solution with [ OH- ] = 1 ×  10-4M?

Identify the Brønsted-Lowry acid in the following reaction. H2O(l) + CO32-(aq)

An experimental electric motor uses multiple, evenly spaced coils to smooth out the torque. Each coil is made of 1300 turns of wire wound on rectangular frames with dimensions 13.7 x 21.7 inches. The coils are fed (one at a time, as the motor turns) by a 96 volt battery pack and each coil has a combined resistance (all 1300 turns) of 2.37 Ω. Calculate the minimum magnetic field strength that must be provided if the motor is to have a torque of 37.7 ft lb. Remember to first convert everything (inches, ft lb) to proper SI units. (Hint: Since only one coil is energized at any given time, you can just consider just that one coil) 

The switch in the circuit below is initially in the OFF position, as shown. It is automatically switched to the ON position for exactly 67.7 ms and then automatically switched back to the OFF position. Find the instantaneous voltage across the 2.0 Ω resistor exactly 33.3 ms after the switch is placed back in the OFF position. 

An fully ionized carbon atom (6 protons + 6 neutrons) is moving with a velocity of 17.7 m/s in an east to west direction in a vacuum chamber, exactly 7.77 cm above a straight current-carrying cable.  The magnetic field from the current in the cable levitates the carbon nucleus as it flies above, so the particle does not fall as it moves horizontally. Calculate the current in the wire and give both the magnitude and direction.  

Choose the answer that correctly spells the word indicated by the pronunciation key MACK-roh-SIT-ik.

The tube that carries urine from the kidney to the bladder. [BLANK-1]

Which of the following terms means area of the small intestine?