CHEMISTRY CHAPTER ONE
The density of mercury is 13.6 g/mL. What is its density in lbs/L? (Hint: 1lb = 0.454 kg)
30.0 lbs/L
Use dimensional analysis to convert 4 days into seconds
345,600 seconds
How many significant figures are in 54,050
4
In the measurement 29.4cm, what number is the uncertain digit?
4 is uncertain.
Simge's guinea pig weighs exactly 560 grams. Which of the following most accurately expresses the weight of Simge's guinea pig in scientific notation?
5.60 x 10²
Which of the following is the closest to a mass of 500mL of water?
500g
The area of a rectangle can be found by multiplying its length by its width. What is the area of a rectangle that is 5.6cm in length and 9.24cm wide? Report your answer with the correct number of significant figures.
52cm²
Which of the following is a conversion factor?
60 seconds/1minute
If you add 50.0 mL of water to a beaker containing 22 mL of water, then how much water do you have in the beaker?
72 mL
If you are driving at a speed of 55.0 miles per hour, then what is your speed in meters per second? (Hint: 1 mile = 1,600 meters)
24.4 meters/second
One mole of aluminum atoms has a mass of 27 grams. How many grams are in 9.0 moles of aluminum?
243 grams
How many mL are in 3.4L
3,400mL
What is the mass of a liquid with a density of 2.12 g/mL and a volume of 53.0 mL?
112g
Which measurement has higher uncertainty?
120
How many significant figures should the product of 1.2 x 1.4592 contain?
2
You are measuring the volume of a liquid that is 20.31 mL. What are you certain digits in this measurement?
2, 0, and 3
What is the density of a solid that has a mass of 9.2 grams and a volume of 12.3^3? Would this object float or sink in water?
0.75 g/cm^3, float
An empty container has a mass of 62.000 grams. You fill it with 24.6 mL of a liquid. The final mass of the container is 81.34 grams. What is the density of the liquid to the correct number of significant figures? (density of the liquid = mass of the liquid divided by the volume of liquid)
0.786 g/mL
What do we call an SI unit that is created by combining base units using algebra?
A derived unit.
What is kinetic energy?
Energy in motion
Why should you wait for temperature to stabilize before taking a reading?
Energy is transferring from the warm system to the cooler one. Once transfer is complete, the system is at equilibrium and the temperature can be read.
What is SI units shorthand for?
International System of Units
What are the best units for measuring temperature in a physical science lab?
Kelvin and Celsius
Which of the following is an example of a unit?
Meter
What is temperature a measurement of?
The average kinetic energy of a system.
What would give you a more precise reading, a yard stick with feet as its smallest unit or a yard stick with inches as its smallest unit?
The yard stick with inches
In the SI units, what makes the base units special?
They are the most basic units from which others are obtained.
What is the point of having units in the sciences?
They distinguish our numbers as measurements instead of pure numbers.
How many significant figures are in the number 0.220?
Three, the leading zero is not significant, but the rest are.
When measuring temperature, why should you keep your thermometer suspended in the system?
To decrease the chances of breaking the thermometer or the container, to ensure only the temperature of the system is taken, and to avoid taking the temperature of the container
Which of the following are arranged from smallest unit to largest unit?
mm, cm, m, km