chemistry unit 0
the distance between carbon atoms in ethylene is 134 picometers. which of the following expresses that distance in meters?
1.34 × 10^-10 m
The average distance from Earth to the sun is 150 megameters. what is the distance in meters?
1.5 x 10^8 m
A large pizza has a diameter of 15 inches. Express this diameter in centimeters.
38 cm
The mass of a sample is 550 milligrams. Which of the following expresses that mass in kilograms?
5.5 × 10^-4 kg
You prepare 1000. mL of tea and transfer it to a 1.00 quart pitcher for storage. Which of the following statements is true?
The pitcher will be completely filled and a small amount of tea will overflow.
water vapor is less dense than ice because
molecules in the gas phase have more space between them than in solids
which of the following is a chemical change?
broiling a steak on a grill
which of the following represents the largest volume?
100 mL
The area of a 15-inch pizza is 176.7 in2. Express this area in square centimeters.
1140. cm2
A dose of medication was prescribed to be 35 microliters. Which of the following expresses that volume in centiliters?
3.5 × 10^-3 cL
the average distance between the earth and the moon is 240,000 miles. express this in kilometers.
9.4 x 10^4 km
kinetic energy
energy of motion
which of the following activities is not apart of good science?
indulging in speculation
During the swing of a frictionless pendulum, what energy form(s) remain constant?
kinetic plus potential energy
select the best statement regarding physical changes
physical changes may be reversed by changing the temperature
potential energy
stored energy
