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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. An oxidation-reduction rxn that occurs spontaneously has what kind of E^o for the cell?
Vertically; perpendicular to all surfaces
Positive
H has a small atomic radius
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4

2. What happens if an atom undergoes positron decay or electron capture?
F = GMm/r^2
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
The reaction between the base and water
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

3. In Bohr model of atom when is energy emitted?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Yes - if the particle's trail is equidistant between two adjacent anodes
(density[p])(volume)
When electron falls from high energy to low energy level

4. What gas is evolved when copper is placed in a nitric acid (HNO3) solution? This is what type of rxn?
It's weight = mg; h
NO; reduction-oxidation
Positron because this is known as positron decay/electron capture
Force times the distance over which the force acts

5. What is the equation for bouyant force? What is p?
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Total internal reflection
B = pVg; density
0 Hz because they are traveling side by side at the same speed

6. Isotopes have diff number of ______ but same what?
Neutrons; atomic number
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
Alkali metals = first column
The number of electrons emitted

7. 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?
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
Colligative; the number of solute particles present
Helium; 4
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

8. Mechanical waves in a medium fxn to transport what?
Half of the exponent
Energy
Decreasing potential energy
When you have central atom with six ions on it

9. Acetic acid is a ______ solvent
F = GMm/r^2
Polar
When you have central atom with six ions on it
A positron or electron; when atomic number goes up you know an electron has been emitted

10. When does red litmus paper turn blue?
An odd number
Faraday/electrons
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
In the presence of a base

11. What does spatial resolution refer to?
Ability to locate an event in space
A constant force on a mass causes it to have a constant acceleration
Density (gravitational constant) height
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

12. What is the unit for Young's Modulus?
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
The buoyant force on it; W = mg = pVg
Pascal (N*m^2)
+/- 1/2

13. The force on an electrical charge is what?
Mv = mv
Positron emission
When all the external forces = zero
F =ma and F= qE

14. 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?

15. What is the equation for pressure?
+/- 1/2
Density (gravitational constant) height
Going from solid to gas phase
3+

16. Beta decay is the emission of what? How do you know what it is the emission of?
It will be reduced the voltage produced by the resistor which means IR; E- IR
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
The path is longer on the inclined plane so it will take object longer to reach the bottom
A positron or electron; when atomic number goes up you know an electron has been emitted

17. What is the net result on a nucleus when you absorb a deuturon and emit a neutron?
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 mass number stays the number but the atomic number decreases by one - usually resulting in another element
The nucleus gains a proton and no neutrons
B = pVg; density

18. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
T = 2pi/angular velocity; v/r
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
One that has more solute particles per liter of solution
Vertically; perpendicular to all surfaces

19. 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?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
400 to 700 nm
Voltage

20. What is different between an inclined plane and free fall?
Pascal (N*m^2)
The path is longer on the inclined plane so it will take object longer to reach the bottom
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
(density[p])(volume)

21. 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?
(+)
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
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
Add them together

22. 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
400 to 700 nm
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Mag and direction

23. If both weight and bouyant force are dependent on g - that makes g independent of 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
The volume of the ice cube or whatever it is
Isolating an atom from minerals by decomposing the minerals with an electric current
At an equal distance behind it as the object is in front of the mirror

24. If something is very toxic to a human - what Ksp value should it have for it to be the safest?
The lowest one
H has a small atomic radius
Ease of polarizability of the molecule and thus increasing molecular weight of mass
The lowest whole number ratio of moles of each element in a mole of a cmpd

25. What are the three separate module for tensile stress - shear stress - and compression/expansion?

26. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
H has a small atomic radius
They must balance
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous

27. The basicity constant Kb measures what?
How strong a base is
Attractive molecular forces acting between material surfaces in contact
+/- 1/2
Isolating an atom from minerals by decomposing the minerals with an electric current

28. Can a catalyst shift equilibrium?
Electrons from anode and battery
400 to 700 nm
6.02 x 10^23 ions/mol
No - it increases the speed at which the rxn reaches that equilibrium

29. The probability of an X-ray emission event at a given wavelength is measured by what?
No - it increases the speed at which the rxn reaches that equilibrium
Helium; 4
From peak to peak
Its intensity in the spectrum

30. What kind of charge is on Al?
E = (kq)/r^2
It's weight = mg; the work would be the weight times the distance fell
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
3+

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

32. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
Sp^3
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Accelerated by a higher voltage between the cathode and anode
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens

33. How many mL is in one liter?
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
1000
Ease of polarizability of the molecule and thus increasing molecular weight of mass
Zero

34. What is the equation for work done?
The force along the board to the normal force
W = F(displacement)
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Negative

35. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
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
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
1000

36. Hydrogen has what kind of standard oxidation or reduction potential?
T = 2pi/angular velocity; v/r
Zero
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
Electron shell number

37. For a given flow rate - the speed of fluid flow is inversely proportional to what?
Its intensity in the spectrum
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
The cross-sectional area through which the fluid flows
That it is negative

38. In PV=nRT - if temp increases what will happen to volume?
F =ma and F= qE
E = (kq)/r^2
It will increase as well because they are directly related - only if pressure is kept constant
That it is negative

39. Nuclear masses can be approximated from what?

40. if lead is successively preciptated as PbSO4 - PbI - and PbCO2 - which is less soluble than which? Thus which anions will be precipitated first?
A salt and water
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
How strong a base is
One that has more solute particles per liter of solution

41. What is the amt of energy that a frictional force generates?
The volume of the ice cube or whatever it is
Force times the distance over which the force acts
Going from solid to gas phase
T = 2pi/angular velocity; v/r

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

43. How should the period of a waveform be calculated?
3+
T = 2pi/angular velocity; v/r
Momentum
From peak to peak

44. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
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
Positron emission
It can absorb light that lets other electrons fill those orbitals
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

45. The coefficient of kinetic friction is always lower than what? Therefore what?
7 always!!!
Vertically; perpendicular to all surfaces
NO; reduction-oxidation
That of static friction; there is a net accelerating force on the block once it starts to slide

46. A floating ice cube implies that it's weight is balanced by what?
0 Hz because they are traveling side by side at the same speed
Isolating an atom from minerals by decomposing the minerals with an electric current
An odd number
The buoyant force on it; W = mg = pVg

47. What is sublimation?
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
Positive
Going from solid to gas phase
NO; reduction-oxidation

48. 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?
T = (2h/g)^1/2; distance = vt
Electrons from anode and battery
(+)
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus

49. How do you find moles of a substance when you are given faradays and electrons?
Their freq is smaller and energy is smaller; when wavelength is smaller freq is larger and higher energy = more dangerous
When HIn is turned into In- - which is dependent upon the pKa of the indicator
Faraday/electrons
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

50. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
One that has more solute particles per liter of solution
Colligative: it depends on the number of solute molecules in a given volume of water
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14