Properties of Matter
Which one of following properties of aluminum are physical properties? (Select all that apply)
a. silvery white
b. reacts vigorously with chlorine
c. melting point = 660 C
d. malleable
a, c, d
A negative exponent means what?
Number less than one
What is the correct equation for percent error?
experimental value - accepted value / accepted value *100%
How many mL in a L?
1000
What is the equation for density?
Mass over Volume
Is craft glue homogenous or heterogenous?
homogenous
Expand 7.6 x 10-6
0.000076
The Lakers having a 0/11 from the three point line yesterday is an example of poor
accuracy and precision
The directions for an experiment ask each student to measure 1.84 g of copper (Cu) wire. If there are 50.0 g of wire, how many students can do the experiment before the wire runs out?
27 students
What is the density, in g/cm3, of an object with a mass of 21 g and a volume of 15 cm3?
1.4 g/cm3
The process of distillation could be used to separate which of these mixtures?
a. water and table salt
b. table sugar and cornstarch
c. liquid water and ice cubes
d. sand and rocks
A
How many sig figs in 9.8000 x 104
5
What's the difference between precision and accuracy?
An experiment requires 38 g of sodium bicarbonate. One container of sodium bicarbonate contains 454 g. How many containers will the teacher require to provide enough sodium bicarbonate for 20 students?
2
What's the volume of a 60.0 g object with a density of 2.12 g/cm3 ?
28.3 cm3
400
Write 3,200,000 in scientific notation
3.2 x 106
In an an experiment, a student estimates the acceleration to do gravity is 9.31 m/s2. The actual value is 9.8 m/s2. What is the student's percent error?
5.0%
A watch loses 0.15 s every minute. How many minutes will the watch lose in 1 day?
3.6 minutes
A plastic ball with a volume of 19.7 cm3 has a mass of 15.8 g. Would this ball sink or float in a container of gasoline? (Density of gasoline is 0.68 g/cm3)
Sink
What lab methods could be used to distinguish between table salt and sugar?
conductivity test, melting point
One beaker contains 19.92 mL, another contains 14.0 mL, and a third contains 10.6 mL. What is the total volume of the three beakers? Your answer must have the appropriate amount of sig figs.
44.5 mL
Consider three basketball free throw shooters and comment on their accuracy and precision
1. 99 of 100 shots are made
2. 99 of 100 shots hit the front of the rim and bounce off
3. 33 of shots are made; the rest are a miss
1. accurate and precise
2. precise but not accurate
3. neither accurate nor precise
A 2.00-kg sample of bituminous coal is composed of 1.30 kg of carbon, 0.20 kg of ash, 0.15 kg of water, and 0.35 kg of volatile (gasforming) material. Using this information, determine how many kilograms of carbon are in 125 kg of this coal.
What method did Archimedes use to determine that the gold was not pure gold?
Volume displacement