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DSST Physical Sciences2

Subjects : dsst, science

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

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. When an element decreases its atomic number by one what is emitted?
T = (2h/g)^1/2; distance = vt
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Positron because this is known as positron decay/electron capture
The path is longer on the inclined plane so it will take object longer to reach the bottom

2. Can a catalyst shift equilibrium?
When electron falls from high energy to low energy level
The cross-sectional area through which the fluid flows
They must balance
No - it increases the speed at which the rxn reaches that equilibrium

3. If any species is gotten rid of when combining two equations of chemical rxns together what can you conclude about those species?
+/- 1/2
Going from solid to gas phase
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
That they are catalysts in the rxn because they react with the substrate and are reformed

4. In Bohr model of atom when is energy emitted?
When electron falls from high energy to low energy level
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
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
Its intensity in the spectrum

5. 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?
It can also equal 'mg'; the compressive strength of a substance
You look at what is being oxidized and reduced in the problem
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
(+)

6. Isotopes have diff number of ______ but same what?
Only temperature of the water bath
Positron emission
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Neutrons; atomic number

7. What is the relationship between P and n in PV=nRT?
H = negative and S = positive
Decreasing potential energy
F =ma and F= qE
They are directly proportional

8. An alpha particle can also be assumed to be what element? What is the mass number of Helium?
Helium; 4
Electron shell number
The element's mass number
H has a small atomic radius

9. What does specific heat of a substance tell you? Thus what does a higher specific heat tell you?
-l to +l
400 to 700 nm
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
The force along the board to the normal force

10. The electrical force on a particle depends on what?

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11. In PV=nRT - if temp increases what will happen to volume?
400 to 700 nm
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
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

12. If you have an alcohol with OH on the end and then another cmpd with an O in the middle but no H - what is different between the bonds they can make with water?

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13. What is the magnitude of the electric field produced by a point charge?
F =ma and F= qE
[S][2S]^2 = 4S^3
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
E = (kq)/r^2

14. What kind of charge is on Al?
3+
They are directly proportional
F =ma and F= qE
The lowest whole number ratio of moles of each element in a mole of a cmpd

15. What is conserved in an inellastic collision?
Momentum
The particle's charge and the magnitude of the electric field
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
[A]^a[B]^b

16. What is the spin projection quantum number?
+/- 1/2
The path is longer on the inclined plane so it will take object longer to reach the bottom
Energy
P = F(v) = mg(v -terminal)

17. The electrons emitted from cathode are replaced with what?
Gravity
Electrons from anode and battery
The current is the same
Negative

18. What color is above 656 nm?
Only temperature of the water bath
Red
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
They increase because you hear a lower frequency

19. The closer the spacing of the anode wire - the better one can specify what?
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Where an event took place
No - it increases the speed at which the rxn reaches that equilibrium
P = F(v) = mg(v -terminal)

20. Mechanical waves in a medium fxn to transport what?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
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)
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Energy

21. What is usually conserved over oscillation periods?
Energy
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
3+
That it is negative

22. How should the period of a waveform be calculated?
Liquid displaced by that object
Colligative: it depends on the number of solute molecules in a given volume of water
Pascal (N*m^2)
From peak to peak

23. If temperature arises during a mixture what can you conclude about the enthalpy?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
That it is negative
F =ma and F= qE
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

24. How do you figure out the literature Ksp value of a compound?
Momentum
A saturated solution in which the aqueous ions are in equilibrium with the solid
When electron falls from high energy to low energy level
Add them together

25. What would the force be of a block on a pulley? What would be its displacement?

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26. When the source of a sound is flying away from you what happens to the wavelengths from peak to peak?
Accelerated by a higher voltage between the cathode and anode
They increase because you hear a lower frequency
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
Negative

27. 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?
Total internal reflection
Isolating an atom from minerals by decomposing the minerals with an electric current
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
T = (2h/g)^1/2; distance = vt

28. What is the unit for Young's Modulus?
That it is negative
That of static friction; there is a net accelerating force on the block once it starts to slide
400 to 700 nm
Pascal (N*m^2)

29. How do you find specific gravity of an object?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
The regular one
Vertically; perpendicular to all surfaces
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

30. How do you balance redox rxns?

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31. Is the work done by air resistance - positive or negative?
B = pVg; density
Negative
NO; reduction-oxidation
0 Hz because they are traveling side by side at the same speed

32. What is the magnetic quantum number?
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 number of electrons emitted
-l to +l
Colligative: it depends on the number of solute molecules in a given volume of water

33. How do you find 'g' from Newton's law of gravity?
E = (kq)/r^2
H has a small atomic radius
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
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

34. How many mL is in one liter?
Energy
Positron because this is known as positron decay/electron capture
The current is the same
1000

35. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Constant to overcome the heat of fusion (solid to liquid state)
Electron shell number
That they are catalysts in the rxn because they react with the substrate and are reformed

36. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
Constant to overcome the heat of fusion (solid to liquid state)
One mole of electric charge
One that has more solute particles per liter of solution
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

37. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
It can absorb light that lets other electrons fill those orbitals
The particle's charge and the magnitude of the electric field
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)

38. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
One that has more solute particles per liter of solution
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
T = 2pi/angular velocity; v/r

39. What kind of geometry is octahedral?
When you have central atom with six ions on it
Attractive molecular forces acting between material surfaces in contact
When all the external forces = zero
The cross-sectional area through which the fluid flows

40. 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?
Positron emission
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Isolating an atom from minerals by decomposing the minerals with an electric current
In the presence of a base

41. Beta decay is the emission of what? How do you know what it is the emission of?
The volume of the ice cube or whatever it is
A positron or electron; when atomic number goes up you know an electron has been emitted
[A]^a[B]^b
Colligative: it depends on the number of solute molecules in a given volume of water

42. Heat from friction comes from what?
A constant force on a mass causes it to have a constant acceleration
Decreasing potential energy
A function of the total number of molecules; if there is one mol of CO2 for every 2 mol of H20 then H20 is 2/3 the total pressure
Only temperature of the water bath

43. What is Avagadro's number regarding ions/mol?
It has a positive oxidation potential so it is easily oxidized
When HIn is turned into In- - which is dependent upon the pKa of the indicator
6.02 x 10^23 ions/mol
L = wavelength/2 so L= (wavelength)(2)

44. What if the circuit elements are in series?
The current is the same
The lowest whole number ratio of moles of each element in a mole of a cmpd
The cross-sectional area through which the fluid flows
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

45. The volume of an object is equal to water?
That of static friction; there is a net accelerating force on the block once it starts to slide
Liquid displaced by that object
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

46. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
+/- 1/2
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Energy
Cathode; anode

47. 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?
Energy
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
[A]^a[B]^b
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

48. 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?
At an equal distance behind it as the object is in front of the mirror
That of static friction; there is a net accelerating force on the block once it starts to slide
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
0 Hz because they are traveling side by side at the same speed

49. Half-sine wave shape is what kind of wavelength with regards to length?
Pascal (N*m^2)
Add them together
L = wavelength/2 so L= (wavelength)(2)
W = F(displacement)

50. What is the equation for work done?
It's weight = mg; the work would be the weight times the distance fell
W = F(displacement)
How strong a base is
Mg