Author Question: A resistance heater is rated at 1200 W when operating at 110 V dc. What current will it draw? A) ... (Read 77 times)

sammy · **on:** Jul 29, 2018

A resistance heater is rated at 1200 W when operating at 110 V dc. What current will it draw?

A) 0.090 A B) 1.0 A C) 12 A D) 11 A

Question 2

A sealed container holds 0.020 moles of ideal nitrogen (N2 ) gas, at a pressure of 1.5 atm and a temperature of 290 K.

The atomic mass of nitrogen is 14.0 g/mol. How many molecules of nitrogen are in the container? (R = 8.31 J/mol K, 1 atm = 101 kPa)
A) 1.5 1021 mol
B) 3.0 1021 mol
C) 6.0 1021 mol
D) 1.2 1022 mol
E) 2.4 1022 mol