Physical or Chemical?
Calculations
SigFigs / Sci. Notation
Chem-is-try
Randomosity
100
A new substance is formed.
What is a chemical change?
100
100.0g / 250mL
What is 0.40 g/mL ?
100
Write the following number in scientific notation: 50640
What is 5.064 x 10^4 ?
100
Definition of matter.
What is anything that has mass and takes up space.
100
A sample is releasing heat energy. Is this an endothermic or exothermic process?
What is an exothermic process?
200
Paper torn into smaller pieces.
What is a physical change?
200
800.5 x (2.0 x 10^4)
What is 16,000,000 or 1.6 x 10^7 ?
200
Write the following number in scientific notation: 0.0000504
What is 5.04 x 10^-5 ?
200
Complete the sentence: It's called chem-is-try. If it were easy, it would be called _____________.
What is chem-succeed ?
200
The instrument used to measure earthquakes.
What is a seismometer ?
300
Candle wax melting.
What is a physical change?
300
A sample of water at room temperature 22℃ is heated 25℃. What is the change in temperature.
What is 25℃?
300
The significant figures of 60290
What is 4 ?
300
Describe the difference between the terms "element" and "compound".
What is element - one kind of atom. Compound - different atoms bonded together (in a specific ratio).
300
Rudolph's (the red nose reindeer) father.
Who is Blitzen ?
400
Name a change similar to wax melting and explain why the two changes are similar.
What is...example... Physical change/phase change
400
What is the density of a liquid if the volume is 35 mL and the mass is 15 g?
What is 0.43 g/mL ?
400
Determine the product and write your answer in correct significant figures. 105 x (3.1 x 10^5)
What is 3.3 x 10^7 ?
400
The state of matter that has a fixed shape and fixed volume.
What is solid?
400
The location of where footballs are made (at least state specific).
What is a Wilson factory in Ada, Ohio ?
500
Describe two different chemical changes and explain why they are classified as a chemical change.
What are... 2 examples... Reasoning: - Not reversible - Forms bubbles - Forms solids - New odor - Unpredicted/irreversible color change - Release/absorbs energy (heat/light)
500
How much heat is required to raise the temperature of 150.0 grams of water from 20.0℃ to 80.0℃? The specific heat of water is 4.184 J/g x ℃. Is this an endothermic or exothermic reaction?
What is 37,700 Joules or 3.77 x 10^4 Joules? What is an endothermic reaction (temperature increases)?
500
Determine the quotient and write your answer using significant figures. (5.0 x 10^4) / (2.50 x 10^2)
What is 2.0 x 10^2 ?
500
The common UNITS to measure heat energy.
What are Calories and Joules?
500
The time (in minutes) it takes for your eyes to adjust to night vision - can be a range.
What is 30-45 minutes ?
M
e
n
u