Which of the following substances is molecular (composed of individual molecules) in composition?
A) carbon in coal
B) drinking water
C) a copper ingot
D) helium in a balloon
Question 2
How much does it cost to operate five 80-watt light bulbs for 24 hours at a rate of 5 cents per kWh?
A) 96 cents
B) 83 cents
C) 0.48 cents
D) 48 cents
E) 9.6 cents