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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. What is the magnetic quantum number?
-l to +l
It's weight = mg; h
The nucleus gains a proton and no neutrons
Polar

2. What is newton's second law?
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
+/- 1/2
It can absorb light that lets other electrons fill those orbitals
A constant force on a mass causes it to have a constant acceleration

3. Terminal voltage is provided to what?
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
It's weight = mg; h
Positive
External components of the circuit

4. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
+/- 1/2
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
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
Sp^3

5. In order to guarantee a non-zero spin how many electrons are needed?
An odd number
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
3+
Vertically; perpendicular to all surfaces

6. 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?
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
Force times the distance over which the force acts
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)
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

7. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
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
The number of electrons emitted
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
They increase because you hear a lower frequency

8. What energy conversion describes best what takes place in a battery-powered resistive circuit?
They do not differ
3+
(density[p])(volume)
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

9. 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?
Add them together
They increase because you hear a lower frequency
It has a positive oxidation potential so it is easily oxidized
F = GMm/r^2

10. Thus is Zn (which has positive oxidation potential) reacts with HCl - will any rxn take place?
Sp^3
It's weight = mg; the work would be the weight times the distance fell
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
Neutrons; atomic number

11. What is a metathesis rxn?
The reaction between the base and water
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
Mv = mv
180 degrees; when there is half a wave distance in phase between two waves

12. Is the work done by air resistance - positive or negative?
The buoyant force on it; W = mg = pVg
H = negative and S = positive
Negative
Zero

13. The basicity constant Kb measures what?
How strong a base is
Electrons from anode and battery
Isolating an atom from minerals by decomposing the minerals with an electric current
When you have central atom with six ions on it

14. What is the equation for pressure?
They must balance
Density (gravitational constant) height
Mg
The particle's charge and the magnitude of the electric field

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

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16. What is different between an inclined plane and free fall?
Mg
Density (gravitational constant) height
The path is longer on the inclined plane so it will take object longer to reach the bottom
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

17. The total pressure of a solution is what? Give example.
One mole of electric charge
Red
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 particle's charge and the magnitude of the electric field

18. If you have circuit elements in parallel what is the same across them?
Colligative: it depends on the number of solute molecules in a given volume of water
Voltage
P = IV
Decreasing potential energy

19. 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?
One that has more solute particles per liter of solution
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)
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

20. Why does light travel slower in an optically dense medium than through a vacuum?
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)
Energy
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

21. In radioactive decay the atomic number (A) and mass number (Z) must what?
Mag and direction
They must balance
Energy
It can also equal 'mg'; the compressive strength of a substance

22. What is the law of conservation of linear momentum?
A positron or electron; when atomic number goes up you know an electron has been emitted
When you have central atom with six ions on it
Mv = mv
Electrons from anode and battery

23. Can a catalyst shift equilibrium?
It has a positive oxidation potential so it is easily oxidized
Voltage
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
No - it increases the speed at which the rxn reaches that equilibrium

24. What is Avagadro's number regarding ions/mol?
6.02 x 10^23 ions/mol
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
External components of the circuit
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

25. The square root of 10^anything is equal to what?
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Half of the exponent
It will increase as well because they are directly related - only if pressure is kept constant
B = pVg; density

26. The number of incident photons on the cathode affect what?
Half of the exponent
Total internal reflection
It can absorb light that lets other electrons fill those orbitals
The number of electrons emitted

27. Regarding M(OH)2 and you have solubility (S) - what would the Ksp be?
[S][2S]^2 = 4S^3
180 degrees; when there is half a wave distance in phase between two waves
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 regular one

28. The free energy change (G) must be negative when what?
It experiences a constant electric force of qE and will thus accelerate towards the positive plate
Alkali metals = first column
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
H = negative and S = positive

29. Friction is caused by what?
From peak to peak
It will increase as well because they are directly related - only if pressure is kept constant
Attractive molecular forces acting between material surfaces in contact
Wavelength: (change in y)/(y) = v/c frequency: (change in f)/(f) = -v/c

30. Does the temperature of a water bath or amount of water in a water bath determines if a substance melts?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
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
Momentum
Only temperature of the water bath

31. What do electrolytic techniques involve?
Isolating an atom from minerals by decomposing the minerals with an electric current
(+)
B = pVg; density
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

32. If temperature arises during a mixture what can you conclude about the enthalpy?
That it is negative
The volume of the ice cube or whatever it is
Its intensity in the spectrum
Attractive molecular forces acting between material surfaces in contact

33. 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?
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
Add them together
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The particle's charge and the magnitude of the electric field

34. What kind of metals react violently with water?
Alkali metals = first column
V/m or N/C
P = IV
Mag and direction

35. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
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
From peak to peak
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors

36. What does the empirical formula show?
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles
Total internal reflection
Colligative; the number of solute particles present
The lowest whole number ratio of moles of each element in a mole of a cmpd

37. Always remember that velocity has ____ and ____
Mag and direction
The buoyant force on it; W = mg = pVg
H = negative and S = positive
Colligative: it depends on the number of solute molecules in a given volume of water

38. In general what is formed by an acid-base rxn?
It can also equal 'mg'; the compressive strength of a substance
Positron because this is known as positron decay/electron capture
180 degrees; when there is half a wave distance in phase between two waves
A salt and water

39. What is Newton's Universal Law of Gravitation?
[A]^a[B]^b
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
Light is absorbed and re-emitted by the atomic structure of the optically dense medium
F = GMm/r^2

40. Half-sine wave shape is what kind of wavelength with regards to length?
L = wavelength/2 so L= (wavelength)(2)
1) Young's Modulus 2) Shear Modulus 3) Bulk Modulus
A constant force on a mass causes it to have a constant acceleration
Sp^3

41. The closer the spacing of the anode wire - the better one can specify what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
Where an event took place
+/- 1/2
It will be reduced the voltage produced by the resistor which means IR; E- IR

42. Considering the answer in the last slide - what kind of a solution would have a lower freezing pt?
Accelerated by a higher voltage between the cathode and anode
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
One that has more solute particles per liter of solution
They increase because you hear a lower frequency

43. 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
The regular one
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Polar

44. In order to increase the kinetic energy of electrons - they must be what?
Pascal (N*m^2)
180 degrees; when there is half a wave distance in phase between two waves
Accelerated by a higher voltage between the cathode and anode
The number of electrons emitted

45. How do you find 'g' from Newton's law of gravity?
They increase because you hear a lower frequency
Mag and direction
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Ability to locate an event in space

46. The boiling point of a solution is what type of property? Which means is depends only on what?
You look at what is being oxidized and reduced in the problem
Going from solid to gas phase
Colligative; the number of solute particles present
Attractive molecular forces acting between material surfaces in contact

47. What happens to the atomic number and atomic mass of an element that go under Beta decay or positron emission?
Mass number stays the same but the atomic number increases
The current is the same
From peak to peak
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

48. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
Cathode; anode
The element's mass number
+/- 1/2
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

49. What is the equation for work done?
A saturated solution in which the aqueous ions are in equilibrium with the solid
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)
H has a small atomic radius
W = F(displacement)

50. The temperature of a metal will not increase above its melting point until what?
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
At an equal distance behind it as the object is in front of the mirror
180 degrees; when there is half a wave distance in phase between two waves
It decreases; the work done by the gas in expanding decreases its internal energy