For the following problem, use s separate sheet of paper to solve the problem. Select your answer from the choices given and then upload your solution at the following link:   https://canvas.dccc.edu/courses/28279/assignments/571673   Your work must be shown for full credit. The answer alone is only worth 1 point.       What mass of sodium nitrite must be added to 350. mL of water to give a solution with pH = 8.40?            Ka(HNO2) = 5.6  x 10–4       

Please answer the following question once you have uploaded your free response answer through the following link   https://canvas.dccc.edu/courses/28279/assignments/571673   [Select]

When 70 mL of 0.18 M NH4Cl is added to 70 mL of 0.10 M NH3, relative to the pH of the 0.10 M NH3 solution the pH of the resulting solution will:

For the following problem, use s separate sheet of paper to solve the problem. Select your answer from the choices given and then upload your solution at the following link:   https://canvas.dccc.edu/courses/28279/assignments/571673   Your work must be shown for full credit. The answer alone is only worth 1 point.   What mass of potassium hypochlorite must be added to 450. mL of water to give a solution with pH = 10.20?              Ka(HClO) = 4.0 x 10–8  

An alternator containing eight poles per phase is turning at 900 RPM. What is the output frequency?

The direction of magnetic field rotation is known as _____ rotation.

In order to increase the efficiency of the cooling, some alternators operate in a(n) _____ atmosphere.

The rotating part of a revolving-armature-type alternator is called the _____.

Alternators of small kilovolt-ampere rating are generally _____-cooled.

If one alternator does not produce sufficient power to supply a load, another alternator can be connected to the circuit. The second alternator is connected in _____.