Matter
All of the following changes to a substance are chemical changes EXCEPT: burning, reacting, tarnishing, fermenting, boiling.
Boiling
Convert 164 J to mJ.
164,000 mJ
You have a rock with a volume of 15 cm^3, and a mass of 45 g. What is its density?
3.0 g/cm^3
Convert 140 F to C.
60 C
How many significant figures does this number have: 3.0800
5
Which of the following CANNOT be classified as a pure substance: sucrose, gold, air, nitrogen, table salt.
Air
Convert 6.58 J to cJ
658 cJ
You have a rock with a volume of 30 cm^3 and a mass of 60 g. What is its density?
2.0 g/cm^3
Convert 10 F to C.
-12 C
How many significant figures does this number have: 0.00418
3
All of the following changes to a metal are physical changes except: rusting, bending, cutting, melting, polishing.
Rusting
Convert 337 kJ to J.
337,000 J
A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density?
2.7 g/mL
Convert 2 C to F
36 F
How many significant figures does this number have: 2804
4
Which of the following is a true statement about compounds:
- They are pure substances
- They have properties similar to their constituent elements
- They have variable compositions
- They can be physically separated into their constituent elements
They are pure substances
Convert 1.28 g to cg.
128 cg.
What is the mass of the ethyl alcohol that exactly fills a 200.0 mL container? The density of ethyl alcohol is 0.789 g/mL
157.8 g
Convert 17 C to F
63 F
How many significant figures does this number have: 0.00800
3