Tools of Chemistry
Measurements
Significant Figures
Dimensional Analysis
Scientific Notation
100
I am used to protect your eyeballs!
What is goggles!
100
What is:
A. 68 degrees
B. -3 degrees
C. 11 degrees
100
How many significant figures are in the following numbers?
1.) 876.3
2.) .0024
3.) 100.40
What is...
1.) 876.3 = 4 sigfigs
2.) .0024 = 2 sigfigs
3.) 100.40 = 5 sigfigs
100
Convert 622 ml to ounces (oz). Round to 2 numbers behind the decimal.
(1ml = .032 oz)
What is
19.90 oz
100
Convert 568 into scientific notation
What is 5.68 x 102
200
What is the following tool:
When you want to know how long something is
You use me when you want to find the mass of somehting
What is a ruler and scale/balance
200
What is the volume of liquid in this graduated cylinder?
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What is 24ml
200
The answers to the calculations below should be reported to have how many significant figures?
A.) 19.5/434.97 =
B.) 0.0042 x 1.47 =
What is
A.) 3 Significant Figures
B.) 2 Significant Figures
200
According to dimensional analysis, how would you correctly set up this problem:
How many seconds are in 3 days?
(24 hr = 1 day, 1 hr = 60 min, 1 min = 60 seconds)
What is
3 days * 24hr/1Day * 60min/1hr * 60s/1min
200
Convert 0.00542 into scientific notation
What is 5.42 x 10-3
300
a.) I am used to heat, hold, or mix liquids. I have a flat bottom
b.) Used for heating, mixing, or reacting small amounts of samples
What is.... a beaker and test tube
300
Answer the following
When measuring length
-what tool do you use?
-you measure in what units?
When you measure mass-What tool do you use
- you measure in what units?
What is a
ruler & centimeters
Scale/Balance & grams
300
Round the following to 4 significant figures:
1.) .0089765
2.) 376,765.1
What is...
1.) .008977
2.) 376,800
300
How many mm are in 78 in?
(1in = 2.54 cm 1cm = 10mm)
What is 1981.2 mm
300
Which of the following is a good example of a number in scientific notation?
a.) 67.8 x 10 3
b.) 5.6 x 10 2
c.) 0.6 x 10 2
d.) 456 x 10 3
What is B
400
What is the following tools
a.) I am used to accurately measure the volume of liquids
b.) I hold test tubes in a vertical position
What is a graduated cylinder and test tube rack
400
What is the volume of liquid in the graduated cylinder?
What is 38.0ml
400
Perform the calculations. Round answers appropriately...
1.) 200 x 3.58
2.) 5003 / 3.781
3.) 67.5 - 0.009
What is...
1.) 700
2.) 1323
3.) 67.5
400
How many seconds are in 45 hours
(1 min = 60 seconds, 1 hr = 60 min)
What is 162,000 seconds
400
Convert 6.87 x 105 into standard form
What is 687,000
500
What are the tools for following description:
1. I am used for transferring powders or crystals
2. Determine the mass of a substance
3. Transfer small amounts of liquids
What is...
1. Spatula
2. Scale or balance
3. Pipette
500
Student A: Student B:
Trail 1: 6.7cm 8.8cm
Trial 2: 6.6cm 8.7cm
Trail 3: 6.6cm 8.6cm
Avg: 6.6cm 8.7cm
Actual = 8.7
Where either of the students:
Accurate?
Precise?
What is student B is accurate and precise & student A is precise
500
Solve the following & round appropriately:
(3.4 x 8.90) x (2.3 + 9.002)
What is 340
500
How many dumbo octopuses are in 4 narwhals?
(1 tarsiers=15 frill neck lizards , 2 dumbo octopuses = 1 x 10-4 tarsiers, 3 frill neck lizards = 1 Narwhal)
What is 16,000 Dumbo Octopuses
500
Convert 9.5 x 10-7 into standard form
What is .00000095