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Classify each change as physical or chemical.a. Natural
Chapter 1, Problem 47E(choose chapter or problem)
Classify each change as physical or chemical.
a. Natural gas burns in a stove.
b. The liquid propane in a gas grill evaporates because the valve was left open.
c. The liquid propane in a gas grill burns in a flame.
d. A bicycle frame rusts on repeated exposure to air and water.
Questions & Answers
QUESTION:
Classify each change as physical or chemical.
a. Natural gas burns in a stove.
b. The liquid propane in a gas grill evaporates because the valve was left open.
c. The liquid propane in a gas grill burns in a flame.
d. A bicycle frame rusts on repeated exposure to air and water.
ANSWER:Solution 47E: (a) We have to convert the speed of flies from m/s to Km/h We know The conversion factors are as follows 1000 m =1 km So, 1 km 15.2 m = 1000 m x 15.2 m And, 60 s = 1 min, 1 min 60 min 1 h = 60 min , 1 h Therefore speed of flies in km/h = 1 km x 15.2 mx 60s x 60 min 1000 m 1 min 1 h = 54.7 km/h 3 (b) The lung capacity of the blue whale is 5.0 * 10 L The conversion factors required for convert the volume from L to gallon are