Please help it's due on Monday QUESTION 2
The battery in the circuit diagram below has an emf of 12 V and internal resistance is
negligible. Resistor R has an unknown resistance. The reading of the ammeter is 2 A when
the switch S is OPEN.
A
Holt
12 V
R
5.12
R1 = 42
R2 = 422
(2)
2.1
State Ohm's law in words
2.2
Calculate the
(3)
2.2.1
Total resistance.
2.2.2
(6)
Reading on the voltmeter.
Switch S in now CLOSED.
2.3 How does this change affect the:
2.3.1 Reading on the ammeter? Choose from INCREASES, DECREASES
or REMAINS THE SAME.
Explain the answer.
Reading on the voltmeter? Choose from INCREASES, DECREASES (4)
or REMAINS THE SAME.
2.3.2
Explain the answer.
[19]​

Use henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.7 l of water upon warming from 25 ˚c to 50 ˚c. assume that the water is initially saturated with nitrogen and oxygen gas at 25 ˚c and a total pressure of 1.0 atm. assume that the gas bubbles out at a temperature of 50 ˚c. the solubility of oxygen gas at 50 ˚c is 27.8 mg/l at an oxygen pressure of 1.00 atm. the solubility of nitrogen gas at 50 ˚c is 14.6 mg/l at a nitrogen pressure of 1.00 atm. assume that the air above the water contains an oxygen partial pressure of 0.21 atm and a nitrogen partial pressure of 0.78 atm.