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DSST Physical Sciences2

Subjects : dsst, science

Instructions:

Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. The boiling point of a solution is what type of property? Which means is depends only on what?
Colligative; the number of solute particles present
You see how many moles of each are present and the one with the least is limiting; calculate how many grams/moles of a product will be made
In the presence of a base
The number of electrons emitted

2. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Gravity
[S][2S]^2 = 4S^3
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
That they are catalysts in the rxn because they react with the substrate and are reformed

3. When an element decreases its atomic number by one what is emitted?
Positron because this is known as positron decay/electron capture
The lowest one
Vertically; perpendicular to all surfaces
It experiences a constant electric force of qE and will thus accelerate towards the positive plate

4. How do you balance redox rxns?

5. What is the magnetic quantum number?
T = 2pi/angular velocity; v/r
-l to +l
When HIn is turned into In- - which is dependent upon the pKa of the indicator
An odd number

6. How do you find the equiv capacitance of capacitors in series and parallel? What about if you are trying to find equivalent resistance?
Density (gravitational constant) height
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
The nucleus gains a proton and no neutrons
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

7. What is the doppler equation for wavelength and frequency?
Energy
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Colligative: it depends on the number of solute molecules in a given volume of water

8. The visible spectrum ranges from ____ to _____
The lowest whole number ratio of moles of each element in a mole of a cmpd
3+
400 to 700 nm
-l to +l

9. How many mL is in one liter?
Decreasing potential energy
1000
Momentum
The mass of an acid that yields one mole of H ions or the mass of a base that reacts with one mole of H ions

10. When is a body in translational equilibrium?
That they are catalysts in the rxn because they react with the substrate and are reformed
W = F(displacement)
When all the external forces = zero
Liquid displaced by that object

11. What does spatial resolution refer to?
When electron falls from high energy to low energy level
The number of electrons emitted
Ability to locate an event in space
Mass per unit volume compared to water: so if mass is 15 g and displaces 5g of benzene the ratio of object to liquid mass is 15/5 = 3 and then times 3 by the specific gravity of benzene which is 0.7

12. Neither N2 or O2 have a permanent what? What does this mean?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Mass number stays the same but the atomic number increases

13. Beta decay is the same as what?
Positron emission
It's weight = mg; the work would be the weight times the distance fell
Only temperature of the water bath
You look at how many electrons are needed to reduce one cmpd and that number will be put in front of that cmpd and you do the same thing that's oxidized as well: review #38 on test #11

14. A pendulum moves under the influence of what?
The path is longer on the inclined plane so it will take object longer to reach the bottom
Gravity
(density[p])(volume)
It decreases; the work done by the gas in expanding decreases its internal energy

15. If the source of sound and the listener are traveling side by side at the same speed - what will the change in freq heard by the listener be?
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
0 Hz because they are traveling side by side at the same speed
Neutrons; atomic number

16. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
The regular one
The nucleus gains a proton and no neutrons
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Toward the side with more gaseous molecules; towards the side that doesn't give off as much heat (remember heat is given off when molecules are formed and thus (-) enthalpy)

17. Acetic acid is a ______ solvent
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
Polar
Positron emission
It's weight = mg; the work would be the weight times the distance fell

18. The electrons emitted from cathode are replaced with what?
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Electrons from anode and battery
The buoyant force on it; W = mg = pVg
NO; reduction-oxidation

19. Heat from friction comes from what?
Quantum number that dictates the shape of an orbital; how many angular nodes are present? Spherical shape with no angular nodes thus you have 0 for angular momentum quantum number
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Decreasing potential energy
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

20. If you are given density and volume how do you find mass?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
(density[p])(volume)
Electrons from anode and battery
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

21. Can a charged particle be detected by two anodes?

22. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
It can absorb light that lets other electrons fill those orbitals
Total internal reflection
One mole of electric charge
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R

23. The phase difference corresponding to a half wave is what? When do you get destructive interference?
A positron or electron; when atomic number goes up you know an electron has been emitted
180 degrees; when there is half a wave distance in phase between two waves
T = 2pi/angular velocity; v/r
From peak to peak

24. Can a catalyst shift equilibrium?
Ability to locate an event in space
No - it increases the speed at which the rxn reaches that equilibrium
Decreasing potential energy
How much energy is needed to raise one gram of a substance one degree celcius; it tells that you need more energy to increase temperature

25. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
They are directly proportional
Mass number stays the same but the atomic number increases
It has a positive oxidation potential so it is easily oxidized
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

26. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
E = (kq)/r^2
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Mass number stays the same but the atomic number increases

27. So if you are given an equation and it gives you the E^o for both side equations seen in the big equation - what do you do with them?
Accelerated by a higher voltage between the cathode and anode
It will increase as well because they are directly related - only if pressure is kept constant
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Add them together

28. What is the amt of energy that a frictional force generates?
Gravity
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Energy
Force times the distance over which the force acts

29. Kb is the equilibrium constant for what?
The reaction between the base and water
T = 2pi/angular velocity; v/r
The nucleus gains a proton and no neutrons
The element's mass number

30. At the moment of explosion of an object - what is its momementum? Why? After an explosion what is the total momentum carried by all the fragments?
(+)
The current is the same
In the presence of a base
Its momentum is zero because velocity is zero; zero because of conservation of momentum

31. A saturated solution of KNO3 means what? If you add salt that has any of these two ions what will happen? What is this called?
They do not differ
(density[p])(volume)
Only temperature of the water bath
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect

32. Nuclear masses can be approximated from what?

33. Isotopes have diff number of ______ but same what?
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
It can also equal 'mg'; the compressive strength of a substance
180 degrees; when there is half a wave distance in phase between two waves
Neutrons; atomic number

34. What is conserved in an inellastic collision?
The part where it's straight almost up before it curves to plateau at new pH; it can tell you what indicator you could use to detect the equivalence point
Momentum
A positron or electron; when atomic number goes up you know an electron has been emitted
It's weight = mg; the work would be the weight times the distance fell

35. If melting pt of a substance is 80 degrees - then what is the diff in time the substance melts when it is either placed in 100 degree test tube and 90 degree test tube?
The particle's charge and the magnitude of the electric field
Alkali metals = first column
You see how many moles of each are present and the one with the least is limiting; calculate how many grams/moles of a product will be made
It will take longer to melt if the water bath is only at 90 degrees rather than 100 degrees because at 100 degrees the temperature is hotter and thus it will melt faster than at 90 degrees

36. Is the work done by air resistance - positive or negative?
(+)
Quantum number that dictates the shape of an orbital; how many angular nodes are present? Spherical shape with no angular nodes thus you have 0 for angular momentum quantum number
Negative
180 degrees; when there is half a wave distance in phase between two waves

37. How do you find specific gravity of an object?
Mass per unit volume compared to water: so if mass is 15 g and displaces 5g of benzene the ratio of object to liquid mass is 15/5 = 3 and then times 3 by the specific gravity of benzene which is 0.7
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
The reaction between the base and water
Mg

38. What does the empirical formula show?
At an equal distance behind it as the object is in front of the mirror
Positron emission
Look at the reactants and see which atom is being reduced - since it accepts the electron readily and is reduced we can assume it has the highest electron affinity
The lowest whole number ratio of moles of each element in a mole of a cmpd

39. What kind of metals react violently with water?
Alkali metals = first column
The cross-sectional area through which the fluid flows
A salt and water
Positron because this is known as positron decay/electron capture

40. What is the angular momentum quantum number (l)? It is the same as what? What does an S orbital appear to look like? What would it's (l) be?
F =ma and F= qE
Colligative: it depends on the number of solute molecules in a given volume of water
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Quantum number that dictates the shape of an orbital; how many angular nodes are present? Spherical shape with no angular nodes thus you have 0 for angular momentum quantum number

41. The equivalence pt is what part of the titration curve? Thus looking at the range of change between the pH values along this part of the graph can tell you what?

42. In a healthy person standing at rest - a comparison of arterial blood pressure measured in the arm with that in the leg - shows what about the differences between these pressures?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Ability to locate an event in space
1000
The path is longer on the inclined plane so it will take object longer to reach the bottom

43. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Red
It will take longer to melt if the water bath is only at 90 degrees rather than 100 degrees because at 100 degrees the temperature is hotter and thus it will melt faster than at 90 degrees

44. In radioactive decay the atomic number (A) and mass number (Z) must what?
Going from solid to gas phase
They must balance
Where an event took place
H has a small atomic radius

45. The Ksp for a substance of AaBb is what?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
[A]^a[B]^b
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
(+)

46. Why does light travel slower in an optically dense medium than through a vacuum?
6.02 x 10^23 ions/mol
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
The lowest whole number ratio of moles of each element in a mole of a cmpd

47. If the standard potential for a rxn is negative when it is being reduced (thus a negative reduction potential) that means that the resulting atom has what?
A salt and water
It has a positive oxidation potential so it is easily oxidized
Red
H = negative and S = positive

48. What is the formula for the power supplied by a battery to accelerate an electron beam?
P = IV
Decreasing potential energy
Mass number stays the same but the atomic number increases
Vertically; perpendicular to all surfaces

49. What do electrolytic techniques involve?
It can also equal 'mg'; the compressive strength of a substance
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Yes - if the particle's trail is equidistant between two adjacent anodes
Isolating an atom from minerals by decomposing the minerals with an electric current

50. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
Look at the reactants and see which atom is being reduced - since it accepts the electron readily and is reduced we can assume it has the highest electron affinity
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Negative
A current; a magnetic field into a curved path; the charge and mass of the incoming particle and can be effectively used to distinguish different species of particles from one another