Physical Science 20 Final Review
1. Convert the following units into the indicated unit.
a) 28.7mm into m b) 16.347cm into mm c) 289km into Mm
d) 3.82μs into ns e) 7.8km/h into m/s f) 3.58g/cm3 into kg/m3
2. Convert the following into scientific notation.
a) 1287.00 b) 0.0005841 c) 323200 d) 0.00401
3. Convert the following into number form.
a) 3.58 x 10-4 b) 36.98 x 103 c) -22.056 x 10-4 d) 0.033 x 102
4. Indicate the number of significant digits.
a) 0.003410100m b) 605000cm c) 4600.0200s d) 0.0340g
5. Calculate and then determine the number of significant digits.
a) 1.42m + 1.93m + 13.201m – 4.819m b) c)
6. Light travels approximately 3.00 x 108m/s. The Sun is approximately 1.5 x 1011m from the Earth. How many hours does it take the light from the Sun to reach the Earth? (distance = velocity x time) 0.14hrs
7. A 4.28m aluminum rod increased in length by 4.2mm when its temperature is raised by 88°C. Calculate the coefficient of linear expansion of the aluminum rod. 1.1x10-5/°C
8. 8.0m long steel pipes were laid on a day when the temperature was 7.1°C. What gap should have been left between the pipes for the maximum recorded temperature of 41°C? Coefficient of linear expansion of steel is 12 x 10-6 /°C. 3.3mm
9. Determine the specific heat capacity of silver if the mass is 2.0kg, the change in temperature is from 31°C to 43°C and 4.8kJ of heat is added. 2.0x102J/kg°C
10. How much heat is released when 250g of steam at 168°C is condensed and cooled to -42°C?
(Cs = 2020J/kg°C, Ci = 2060J/kg°C, Hf = 3.34 x 105J/kg and Hv = 2.26 x 106J/kg) 810000J
11. Convert the following into the indicated temperature unit
a) 985°C to °F 1805°F b) 568K to °F 563°F c) -125°C to °K 149K
12. 125g of iron with an initial temperature of 589°C is dropped into 4.9L of water at an initial temperature of 12°F. Determine the final temperature of the system. (Ci = 450J/kg°C) -4.2°C
13. If cosmic rays travel at the same velocity as light (c = 3.00 x 108m/s), calculate the frequency of such a wave if its wavelength is 4.32 x 10-12m. 6.9x1019Hz
14. If waves of frequency 5.3Hz are produced in a spring and each wave has a wavelength of 0.69m, calculate:
a) the velocity of the wave. 3.7m/s b) the period of the wave. 0.19s
c) the wavelength if the frequency is decreased to 4.5Hz. 0.82m
15. The speed of water waves is 68cm/s in deep water and 24cm/s in shallow water. If the wavelength in deep water is 1.4cm, what is the wavelength in shallow water? 0.49cm
16. A pinhole camera is pointed at a building 48m high and 210m away from the pinhole. If the film in the camera is 0.21m behind the pinhole, how high is the image of the building on the screen? 4.8mm
17. A ray of light strikes the surface of a pond of water making an angle of 36° with the normal. Calculate the angle of refraction in the water (ηw = 1.33). 26°C
18. A ray of light passes from an object into air. Determine the critical angle for the object with a refractive index of 1.89. 31.9°
19. One light year is 9.5 x 1015m. How many km away is a star that is 13.2 light years away? 1.3x1014km
20. Determine the centre of curvature for a concave mirror whose focal point is located 30.0cm in front of the mirror. 60.0cm
21. Calculate the critical angle of incidence for light traveling from zircon to crown glass . 51°
22. Calculate the amount of heat needed to increase the temperature of a 0.45kg sample of copper from 568°C to its melting point of 1083°C and then melt the entire sample. (Hf = 2.05 x 105J/kg, Hv = 5.07 x 106J/kg and Cc = 385J/kg°C) 180000J
23. Determine the period of a wave that completes 6.0 cycles in 3.2s. 0.53s/cycle
24. Determine the frequency of a wave having a period of 1.3 minutes. 0.013Hz
25. A 40.0g sample of an unknown metal at 115°C is placed in 5.00x102g of water at 15.0°C. If the system reaches thermal equilibrium at 15.7°C, what is the specific heat capacity of the unknown object? Cw = 4180J/kg°C 368J/kg°C
26. Light takes 2.56s to travel from the earth to the moon and back. Determine how far the moon is away from the earth. 384000km
27. A water wave has a wavelength of 1.75m and is moving at 0.54m/s. How many waves pass a point in 20.0s? 6.2 cycles
Types of Chemical Reactions
28. Name the following compounds and state whether they are ionic, covalent or acids:
Name Ionic, Covalent or Acid?
a) Fe2O3 ______
b) MgSO4 ______
c) N2O ______
d) PCl5 ______
e) HCl ______
f) HNO3 ______
g) HNO2 ______
29. Write the formula for the following compounds and state whether they are ionic, covalent or acids:
Formula Ionic, Covalent or Acid?
a) copper (I) oxide ______
b) calcium bromide ______
c) sulfur hexachloride ______
d) diphosphorous pentaoxide ______
e) phosphoric acid ______
f) hydrosulfuric acid ______
g) phosphorous acid ______
30. Name the following alkanes and alkenes:
a) C3H8 ______b) C5H10 ______
31. List 4 things that can happen to indicate to you that a chemical change has taken place.
32. Balance the following reactions and name what type of reaction is occurring: Type
a) ___ NaCl + ___ Ag2SO4 ___ AgCl + ___ Na2SO4 ______
b) ___ H2S + ___ Al ___ Al2S3 + ___ H2 ______
c) ___ Al2O3 ___ Al + ___ O2 ______
d) ___ C3H8 + ___ O2 ___ CO2 + ___ H2O ______
e) ___ Li2O + ___ H2O ___ LiOH ______
33. Complete the following reactions and name what type of reaction it is. (NOTE: for double replacement reactions, label the (aq), (s), salt, H2O(l), acid or base) Type
a) Carbon dioxide + water ______
b) cobalt (III) hydroxide ______
c) C3H6 + O2 ______
d) silver bromide + chlorine ______
e) Barium chloride + potassium sulfate ______
f) nitric acid + sodium hydroxide ______
g) Calcium carbonate + hydrochloric acid ______
34. Write a balanced equation for the following reaction, indicating the state of each species.
Silver nitrate + sodium chloride silver chloride + sodium nitrate
35. Circle whether each of the following reactions should be described as exothermic or endothermic.
a) Fe2O3 (s) + 3 CO (g) 3 CO2 (g) + 2 Fe(s) + 25kJ exothermic or endothermic
b) 2 HCl (g) + 96kJ H2(g) + Cl2(g) exothermic or endothermic
c) 6 FeCl3 (s) 6 FeCl2 (s) + 3 Cl2 (g) ΔH = +173kJ exothermic or endothermic
d) H2(g) + Br2(g) 2 HBr (g) ΔH = -36kJ exothermic or endothermic
The Mole and Stoichiometry
36. Complete the following calculations:
a) 5.00 moles Fe = ______particles
b) 12.04 x1023 molecules HI = ______moles
c) 9.40 moles CuH = ______g
d) 6.40g K2CO3 = ______moles
e) 1.60 moles O2 gas = ______L (volume)
f) 28.2L O2 gas = ______moles
g) 0.200L HCl = ______particles
h) 18.21 x1023 particles NaNO3 = ______g
37. Using your Molarity formula, calculate the missing value from the following:
a) 10.0 moles, 2.00 M = ______L
b) 50.0 moles, 2.00L = ______M
c) 500ml, 0.5 mol/L = ______moles
38. Use the reaction given to answer the following stoichiometry questions:
C2H4 + 3 O2 2 CO2 + 2 H2O
a) If you have 2.50 mol of C2H4, how many moles of O2 are formed?
b) If you have 0.50 mol of O2, determine the mass of CO2 formed.
c) If you have 45.0g of C2H4, how many grams of water will be produced?
39. If 100.0g of Fe3O4 is mixed with 10.0g of hydrogen gas according to the following reaction:
Fe3O4 + 4 H2 3 Fe + 4 H2O
a) What is the limiting reactant?
b) What reactant is in excess? How much is in excess?
c) What mass of iron would be produced?