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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. If you are given density and volume how do you find mass?
Mv = mv
(density[p])(volume)
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
A saturated solution in which the aqueous ions are in equilibrium with the solid

2. What is the formula for the power supplied by a battery to accelerate an electron beam?
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
P = IV
Density (gravitational constant) height
The path is longer on the inclined plane so it will take object longer to reach the bottom

3. How do you find moles of a substance when you are given faradays and electrons?
That of static friction; there is a net accelerating force on the block once it starts to slide
Electron shell number
T = (2h/g)^1/2; distance = vt
Faraday/electrons

4. How do you figure out the literature Ksp value of a compound?
A saturated solution in which the aqueous ions are in equilibrium with the solid
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
A constant force on a mass causes it to have a constant acceleration
Positron because this is known as positron decay/electron capture

5. If you are told to find the maximum number of NiCo3 that can form how do you do that?

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6. Can a catalyst shift equilibrium?
It can also equal 'mg'; the compressive strength of a substance
No - it increases the speed at which the rxn reaches that equilibrium
V/m or N/C
(density[p])(volume)

7. In a rxn - how do you figure out which atom has the highest electron affinity?
Mg
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
Momentum
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

8. 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?
It has a positive oxidation potential so it is easily oxidized
180 degrees; when there is half a wave distance in phase between two waves
The regular one
Sp^3

9. 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?
0 Hz because they are traveling side by side at the same speed
Decreasing potential energy
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
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

10. What is Avagadro's number regarding ions/mol?
That they are catalysts in the rxn because they react with the substrate and are reformed
[S][2S]^2 = 4S^3
6.02 x 10^23 ions/mol
The reaction between the base and water

11. Neither N2 or O2 have a permanent what? What does this mean?
Polar
A positron or electron; when atomic number goes up you know an electron has been emitted
At an equal distance behind it as the object is in front of the mirror
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

12. The coefficient of kinetic friction is always lower than what? Therefore what?
The element's mass number
That of static friction; there is a net accelerating force on the block once it starts to slide
One mole of electric charge
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

13. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
Yes - if the particle's trail is equidistant between two adjacent anodes
Ability to locate an event in space
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Polar

14. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
F =ma and F= qE
The lowest one
It will be reduced the voltage produced by the resistor which means IR; E- IR
Isolating an atom from minerals by decomposing the minerals with an electric current

15. The phase difference corresponding to a half wave is what? When do you get destructive interference?
180 degrees; when there is half a wave distance in phase between two waves
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
0 Hz because they are traveling side by side at the same speed
L = wavelength/2 so L= (wavelength)(2)

16. How do you balance redox rxns?

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17. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Look at how many times smaller the H concentration becomes with relation to rate law: if rate law says [H] is second order: ((10^-2)^2/(10^-1)^2 = 10^-2 and then times that answer by the original rate
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

18. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Momentum
Sp^3
T = (2h/g)^1/2; distance = vt
Attractive molecular forces acting between material surfaces in contact

19. How do you find specific gravity of an object?
Helium; 4
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
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
The density of the water and volume of the lead object

20. What is the relationship between P and n in PV=nRT?
They are directly proportional
Its twice that distance
W = F(displacement)
Liquid displaced by that object

21. What do electrolytic techniques involve?
Ability to locate an event in space
Isolating an atom from minerals by decomposing the minerals with an electric current
One mole of electric charge
180 degrees; when there is half a wave distance in phase between two waves

22. The number of incident photons on the cathode affect what?
Positive
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
The number of electrons emitted
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

23. If temperature arises during a mixture what can you conclude about the enthalpy?
W = F(displacement)
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
That it is 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

24. The coefficient of static friction is the ratio of what?
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The force along the board to the normal force
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
7 always!!!

25. What is weight equal to?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Mg
Voltage
The path is longer on the inclined plane so it will take object longer to reach the bottom

26. In order to increase the kinetic energy of electrons - they must be what?
Accelerated by a higher voltage between the cathode and anode
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
You look at what is being oxidized and reduced in the problem
The buoyant force on it; W = mg = pVg

27. The freezing point of an aqueous solution is what kind of property? What does this mean?
The force along the board to the normal force
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
Colligative: it depends on the number of solute molecules in a given volume of water
3+

28. Kb is the equilibrium constant for what?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
The reaction between the base and water
Pascal (N*m^2)
You look at what is being oxidized and reduced in the problem

29. What is the principal quantum number (n)?
The density of the water and volume of the lead object
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Electron shell number
F = GMm/r^2

30. Melting occurs at what type of temperature? Why?
7 always!!!
Attractive molecular forces acting between material surfaces in contact
Constant to overcome the heat of fusion (solid to liquid state)
Vertically; perpendicular to all surfaces

31. Half-sine wave shape is what kind of wavelength with regards to length?
[A]^a[B]^b
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Pascal (N*m^2)
L = wavelength/2 so L= (wavelength)(2)

32. How do the final velocities differ if a sphere is dropped from a distance rather than rolled down an inclined plane?
They do not differ
That it is negative
Decreasing potential energy
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant

33. F in the Young's modulus equation can also equal what? What is E?

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34. What is the unit for Young's Modulus?
Pascal (N*m^2)
T = (2h/g)^1/2; distance = vt
H has a small atomic radius
A saturated solution in which the aqueous ions are in equilibrium with the solid

35. Acetic acid is a ______ solvent
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Polar
Vertically; perpendicular to all surfaces
When electron falls from high energy to low energy level

36. What is the amt of energy that a frictional force generates?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Force times the distance over which the force acts
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
Light is absorbed and re-emitted by the atomic structure of the optically dense medium

37. 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?

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38. What is conserved in an inellastic collision?
3+
Momentum
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
W = F(displacement)

39. What is newton's second law?
Density (gravitational constant) height
Mv = mv
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)
A constant force on a mass causes it to have a constant acceleration

40. Equivalent mass is what?
Look at how many times smaller the H concentration becomes with relation to rate law: if rate law says [H] is second order: ((10^-2)^2/(10^-1)^2 = 10^-2 and then times that answer by the original rate
Alkali metals = first column
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
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

41. What is the equation for work done?
That of static friction; there is a net accelerating force on the block once it starts to slide
When HIn is turned into In- - which is dependent upon the pKa of the indicator
The density of the water and volume of the lead object
W = F(displacement)

42. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
(+)
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
Density (gravitational constant) height
That they are catalysts in the rxn because they react with the substrate and are reformed

43. What type of acid and base would produce a pH closest to 7?
Strong acid and strong base/ weak acid and weak base
Total internal reflection
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
One mole of electric charge

44. A plane mirror produces an image where?
You look at what is being oxidized and reduced in the problem
They must balance
At an equal distance behind it as the object is in front of the mirror
Energy

45. What is the equation for bouyant force? What is p?
It will be reduced the voltage produced by the resistor which means IR; E- IR
The path is longer on the inclined plane so it will take object longer to reach the bottom
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
B = pVg; density

46. 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?
It's weight = mg; h
It is a rxn where you mix aqueous solutions of cations and anions and the ionic cmpds switch the ions with which they were paired
0 Hz because they are traveling side by side at the same speed
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure

47. What kind of charge is on Al?
3+
When all the external forces = zero
Accelerated by a higher voltage between the cathode and anode
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

48. Why does light travel slower in an optically dense medium than through a vacuum?
One mole of electric charge
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
Look at how many times smaller the H concentration becomes with relation to rate law: if rate law says [H] is second order: ((10^-2)^2/(10^-1)^2 = 10^-2 and then times that answer by the original rate
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

49. If the equation says that the E^o has (-) voltage when being reduced - but it is being oxidized in the problem - what does the voltage then become?
Force times the distance over which the force acts
The volume of the ice cube or whatever it is
Helium; 4
(+)

50. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
H = negative and S = positive
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Its momentum is zero because velocity is zero; zero because of conservation of momentum
It can absorb light that lets other electrons fill those orbitals