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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.
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. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
At an equal distance behind it as the object is in front of the mirror
Positron because this is known as positron decay/electron capture
Cathode; anode
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

2. 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
Its momentum is zero because velocity is zero; zero because of conservation of momentum
The cross-sectional area through which the fluid flows
An odd number

3. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
When electron falls from high energy to low energy level

4. What are the units of an electric field?
400 to 700 nm
Electrons from anode and battery
The volume of the ice cube or whatever it is
V/m or N/C

5. What is the spin projection quantum number?
W = F(displacement)
H has a small atomic radius
Accelerated by a higher voltage between the cathode and anode
+/- 1/2

6. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
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
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
Accelerated by a higher voltage between the cathode and anode
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

7. How do you figure out the literature Ksp value of a compound?
400 to 700 nm
It can absorb light that lets other electrons fill those orbitals
A saturated solution in which the aqueous ions are in equilibrium with the solid
Positron because this is known as positron decay/electron capture

8. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Positive
W = F(displacement)
One that has more solute particles per liter of solution
P = IV

9. The free energy change (G) must be negative when what?
Going from solid to gas phase
H = negative and S = positive
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
An odd number

10. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
+/- 1/2
Energy
NO; reduction-oxidation
No - it increases the speed at which the rxn reaches that equilibrium

11. What is different between an inclined plane and free fall?
The path is longer on the inclined plane so it will take object longer to reach the bottom
Helium; 4
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Half of the exponent

12. What is the doppler equation for wavelength and frequency?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
Accelerated by a higher voltage between the cathode and anode
It can absorb light that lets other electrons fill those orbitals
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

13. 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
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
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
L = wavelength/2 so L= (wavelength)(2)

14. If both weight and bouyant force are dependent on g - that makes g independent of what?
The volume of the ice cube or whatever it is
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The lowest whole number ratio of moles of each element in a mole of a cmpd
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

15. The total pressure of a solution is what? Give example.
Strong acid and strong base/ weak acid and weak base
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
Gravity
The volume of the ice cube or whatever it is

16. When does red litmus paper turn blue?
In the presence of a base
V/m or N/C
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c
Alkali metals = first column

17. The concentration of OH and H30 ions are approximately equal at what pH?
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
B = pVg; density
A salt and water
7 always!!!

18. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
Faraday/electrons
Sp^3
One that has more solute particles per liter of solution
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

19. Charged particles in motion constitute what? Freely moving charges are deflected by what? The curved path depends on what?
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
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
The regular one
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio

20. 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?
Only temperature of the water bath
(+)
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
0 Hz because they are traveling side by side at the same speed

21. Terminal voltage is provided to what?
The density of the water and volume of the lead object
External components of the circuit
Electrons from anode and battery
They must balance

22. Half-sine wave shape is what kind of wavelength with regards to length?
You look at what is being oxidized and reduced in the problem
It can absorb light that lets other electrons fill those orbitals
It's weight = mg; the work would be the weight times the distance fell
L = wavelength/2 so L= (wavelength)(2)

23. Hydrogen has what kind of standard oxidation or reduction potential?
Mag and direction
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Yes - if the particle's trail is equidistant between two adjacent anodes
Zero

24. What is the equation for pressure?
In the presence of a base
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
Density (gravitational constant) height
It will be reduced the voltage produced by the resistor which means IR; E- IR

25. The probability of an X-ray emission event at a given wavelength is measured by what?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Its intensity in the spectrum
The lowest whole number ratio of moles of each element in a mole of a cmpd
E = (kq)/r^2

26. The Ksp for a substance of AaBb is what?
It minimizes the reabsorption of the light because the light must exit the scintillator to reach the photomultiplier where it is converted to an electrical pulse
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
External components of the circuit
[A]^a[B]^b

27. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
One that has more solute particles per liter of solution
Faraday/electrons
Negative
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

28. What is the relationship between P and n in PV=nRT?
L = wavelength/2 so L= (wavelength)(2)
They are directly proportional
Decreasing potential energy
The cross-sectional area through which the fluid flows

29. What is the equation for bouyant force? What is p?
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
The reaction between the base and water
Force times the distance over which the force acts
B = pVg; density

30. How do you find length of time something is in flight? How do you find distance it traveled?
Colligative; the number of solute particles present
One mole of electric charge
T = (2h/g)^1/2; distance = vt
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

31. The force on an electrical charge is what?
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
P = F(v) = mg(v -terminal)
F =ma and F= qE
6.02 x 10^23 ions/mol

32. Why are bonds between H and another atom shorter compared to most?
Yes - if the particle's trail is equidistant between two adjacent anodes
H = negative and S = positive
The force along the board to the normal force
H has a small atomic radius

33. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
The nucleus gains a proton and no neutrons
Mg
Zero
Density (gravitational constant) height

34. If you have a decrease of pressure to which side of the equation is it equilibrium shifted towards? What about if you increase temperature?

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35. What do electrolytic techniques involve?
180 degrees; when there is half a wave distance in phase between two waves
Isolating an atom from minerals by decomposing the minerals with an electric current
Polar
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

36. When you are trying to calculate a galvanic cell's emf - what do you look at?
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
E = (kq)/r^2
You look at what is being oxidized and reduced in the problem
A salt and water

37. The number of incident photons on the cathode affect what?
The number of electrons emitted
Electron shell number
One that has more solute particles per liter of solution
Energy

38. What happens if an atom undergoes positron decay or electron capture?
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
That it is negative
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
When all the external forces = zero

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

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40. What does spatial resolution refer to?
Momentum
Colligative; the number of solute particles present
It has a positive oxidation potential so it is easily oxidized
Ability to locate an event in space

41. In radioactive decay the atomic number (A) and mass number (Z) must what?
That it is negative
They must balance
T = (2h/g)^1/2; distance = vt
Positron because this is known as positron decay/electron capture

42. How do you find 'g' from Newton's law of gravity?
Going from solid to gas phase
Mass number stays the same but the atomic number increases
Its momentum is zero because velocity is zero; zero because of conservation of momentum
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2

43. What is a metathesis rxn?
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
When electron falls from high energy to low energy level
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
Positive

44. Why is it important that the materials used as scintillators are nearly transparent to the wavelength of light they emit?
3+
Zero
It minimizes the reabsorption of the light because the light must exit the scintillator to reach the photomultiplier where it is converted to an electrical pulse
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

45. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Mg
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
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)
Strong acid and strong base/ weak acid and weak base

46. Nuclear masses can be approximated from what?

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47. The volume of an object is equal to water?
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
H = negative and S = positive
3+
Liquid displaced by that object

48. The coefficient of static friction is the ratio of what?
Liquid displaced by that object
The force along the board to the normal force
The current is the same
One mole of electric charge

49. The basicity constant Kb measures what?
E = (kq)/r^2
How strong a base is
A salt and water
[S][2S]^2 = 4S^3

50. Melting occurs at what type of temperature? Why?
Constant to overcome the heat of fusion (solid to liquid state)
The path is longer on the inclined plane so it will take object longer to reach the bottom
Mv = mv
An odd number