Transcript temperature liquid nitrogen

Gold is a precious metal that is chemically
unreactive. It is used mainly In jewelry, dentistry,
and electronic devices. A piece of gold ingot with a
Mass of 301g has a volume of 15.6 cm3. Calculate
the density of gold.
Answer : 19.3 g/cm3
A Piece of platinum metal with a density of 21.5 g/cm3 has a volume
Of 4.49 cm3. What is its mass?
Answer 96.53g
The density of mercury, the only metal that is a liquid at
room temperature, Is 13.6 g/ml. Calculate the mass of
5.50 mL of the liquid.
Answer: 74.8 g
The density of sulfuric acid in a certain car battery is 1.41 g/ml.
Calculate the mass of 242 mL of the liquid.
Answer 341.22g
Solder is an alloy made of tin and lead that is used in electric circuits.
A certain solder has a melting point of 224 C. What is its melting point in
Degrees Fahrenheit?
Answer 435 F
Helium has the lowest boiling point of all the elements at -452 F.
Convert this temperature to degrees Celsius.
Answer: -269 C
Mercury, the only metal that exist as a liquid at room temperature, melts
At -38.9C. Convert its melting point to Kelvins
Answer: 234.3 K
Convert 327.5 C ( the melting point of lead) to degrees Fahrenheit
Answer: 621.5 F
Convert 172.9 ( the boiling point of ethanol to degrees Celsius
Aswer 72.27 C
Convert 77K, the boiling point of liquid nitrogen, to degrees Celsius
Answer: -160.15
Determine the number of significant figures in the following measurements:
a) 478 cm
b) 6.01g
c) 0.825 m
d) 0.043 kg
e) 1.310 x 1022 atoms
f) 700ml
Answers:
a) 3
b) 3
c) 3
d) 2
e) 4
f) 1
Determine the number of significant figures in each of the following
Measurements:
a)
b)
c)
d)
e)
24ml
3001g
0.0320 m3
6.4 x 104 molecules
560 kg
Answers:
a)2
b)4
C)3
d)2
e) 2
Carry of the following arithmetic operations to the correct numbers of
Significant figures:
a)
b)
c)
d)
e)
11251.1 g + 0.1983 g
66.59 L – 3.113 L
8.16 m X 5.1355
0.0154 kg / 88.3 ml
2.64 X 103 cm + 3.27 X 102 cm
Answers:
a) 11254.3
b) 63.48
c) 41.9
d) .000174
e) 2.97 x 10 ^3
Carry out the following arithmetic operations and round off the answers
To the appropriate number of significant figures
a)
b)
c)
d)
e)
26.5862 L + 0.17 L
9.1 g – 4.682 g
7.1 X 104 dm X 2.2654 X 10 2 dm
6.54 g / 86.5542 ml
(7.55 X 104m) –(8.62 X 103 m)
Answers:
a)26.76
b) 4.4
c) 17 x 10^6
d) .0756
e) 6.69 x 10^4
A person averages daily intake of glucose ( a form of sugar) is
0.0833 pound (lb), What is the mass in milligrams ( mg)? 1lb = 453.6g
Answers: 3.78 X 10^4 mg
A roll of aluminum foil has a mass of 1.07 kg, What is its mass in pounds?
Answer: 2.35 ibs
An average adult has 5.2 L of blood. What is the volume of blood in m3
Answers: 5.2 x 10 ^-3 m^3
The volume of a room is 1.08 X 10 8 dm 3. What is the volume is m3
Answer: 1.08 x 10^8 X 10 ^-1