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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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1. In a galvanic and electrolytic cell - reduction of an ion occurs where? Oxidation of an ion occurs where?
400 to 700 nm
Ability to locate an event in space
Cathode; anode
From peak to peak

2. How many mL is in one liter?
Liquid displaced by that object
1000
PbCO2 is less soluble than PbI - and PbI less soluble than PbSO4; CO2 - then I - then SO4
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

3. What do electrolytic techniques involve?
Ease of polarizability of the molecule and thus increasing molecular weight of mass
The mass number stays the number but the atomic number decreases by one - usually resulting in another element
3+
Isolating an atom from minerals by decomposing the minerals with an electric current

4. 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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5. Equivalent mass is what?
Strong acid and strong base/ weak acid and weak base
That of static friction; there is a net accelerating force on the block once it starts to slide
Red
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

6. Young's modulus is a ________ for a material. What is it's ratio? What would a graph of it look like?
Negative
Colligative; the number of solute particles present
Constant; stress/strain = (F/A)/ (change in L/L) = straight line withe positive slope that stays constant
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

7. Isotopes have diff number of ______ but same what?
Neutrons; atomic number
The lowest one
It will increase as well because they are directly related - only if pressure is kept constant
When all the external forces = zero

8. The volume of an object is equal to water?
Liquid displaced by that object
V/m or N/C
A salt and water
Find how many mol of Ni is available and CO3 available and see which one has lowest number and that's how many moles

9. The visible spectrum ranges from ____ to _____
400 to 700 nm
Decreasing potential energy
B = pVg; density
It will be reduced the voltage produced by the resistor which means IR; E- IR

10. The coefficient of kinetic friction is always lower than what? Therefore what?
One that has more solute particles per liter of solution
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
That of static friction; there is a net accelerating force on the block once it starts to slide
The path is longer on the inclined plane so it will take object longer to reach the bottom

11. If you are given a table of substances and are told to find which two show effect of molecular weight on melting point alone - which two substances should you look for?
W = F(displacement)
Polar
It has a positive oxidation potential so it is easily oxidized
You should look for the two substances that appear to be equal in structure - with no structural differences (or as little as possible)

12. The range of pH in which a color change takes place in a titration depends on what?
F = GMm/r^2
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
External components of the circuit
When HIn is turned into In- - which is dependent upon the pKa of the indicator

13. How do you find what is the limiting reagent? You can then use the moles of the limiting reagent to calculate what?
T = 2pi/angular velocity; v/r
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed
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
Mv = mv

14. How do you figure out the literature Ksp value of a compound?
The path is longer on the inclined plane so it will take object longer to reach the bottom
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 saturated solution in which the aqueous ions are in equilibrium with the solid
Ability to locate an event in space

15. If asked which electron configuration of an element is most stable which one do you choose?
Its twice that distance
B = pVg; density
The regular one
Ability to locate an event in space

16. Kb is the equilibrium constant for what?
The reaction between the base and water
No - it increases the speed at which the rxn reaches that equilibrium
Half of the exponent
Decreasing potential energy

17. A cmpd with the lowest carbon to oxygen ratio will require how much oxygen for combustion?
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
The density of the water and volume of the lead object
P = F(v) = mg(v -terminal)
No - it increases the speed at which the rxn reaches that equilibrium

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

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19. What is the hybridization of oxygen in water and other oxygens similar to water with two bonds and two lone pairs of electrons?
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
Sp^3
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
When all the external forces = zero

20. A plane mirror produces an image where?
Mg
One that has more solute particles per liter of solution
There is the maximum amount of K and NO3 ions; crystals will precipitate out; common-ion effect
At an equal distance behind it as the object is in front of the mirror

21. What is the formula for the power supplied by a battery to accelerate an electron beam?
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 = IV
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
H = negative and S = positive

22. When does red litmus paper turn blue?
It's weight = mg; h
Voltage
How strong a base is
In the presence of a base

23. Neither N2 or O2 have a permanent what? What does this mean?
Neutrons; atomic number
When electron falls from high energy to low energy level
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
It can absorb light that lets other electrons fill those orbitals

24. A pendulum moves under the influence of what?
Gravity
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
Colligative: it depends on the number of solute molecules in a given volume of water
The volume of the ice cube or whatever it is

25. The closer the spacing of the anode wire - the better one can specify what?
F =ma and F= qE
The lowest one
Where an event took place
It has a positive oxidation potential so it is easily oxidized

26. What are the units of an electric field?
Colligative; the number of solute particles present
V/m or N/C
Positive
Isolating an atom from minerals by decomposing the minerals with an electric current

27. When looking at which combo of acids and bases will result in a solution with pH of 7 what do we look for?
Momentum
The buoyant force on it; W = mg = pVg
When all the external forces = zero
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14

28. The temperature of a metal will not increase above its melting point until what?
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces
The particle's charge and the magnitude of the electric field
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

29. In PV=nRT - if temp increases what will happen to volume?
Positron because this is known as positron decay/electron capture
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
It will increase as well because they are directly related - only if pressure is kept constant
The buoyant force on it; W = mg = pVg

30. The probability of an X-ray emission event at a given wavelength is measured by what?
Mv = mv
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
The lowest whole number ratio of moles of each element in a mole of a cmpd
Its intensity in the spectrum

31. What does the empirical formula show?
Momentum
Strong acid and strong base/ weak acid and weak base
The lowest whole number ratio of moles of each element in a mole of a cmpd
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. A nearsighted person has what type of focal length? Thus what do we do to correct this?
Voltage
Shorter than it should be so rays from a distant object form in front of retina; use divergent lens
Attractive molecular forces acting between material surfaces in contact
Gravity

33. In a healthy person standing at rest - a comparison of arterial blood pressure measured in the arm with that in the leg - shows what about the differences between these pressures?
It's weight = mg; the work would be the weight times the distance fell
The blood pressure in the leg is greater because the column between the arm and the leg has a hydrostatic pressure
External components of the circuit
No - it increases the speed at which the rxn reaches that equilibrium

34. What is newton's second law?
When all the external forces = zero
It will be reduced the voltage produced by the resistor which means IR; E- IR
Yes - if the particle's trail is equidistant between two adjacent anodes
A constant force on a mass causes it to have a constant acceleration

35. When is a body in translational equilibrium?
400 to 700 nm
When all the external forces = zero
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
Yes because ionic zinc has oxidation of (2+) and Zn is easily oxidized so it will displace H and ZnCl2 will be formed

36. What direction do gravity and bouyancy work? What direction does water pressure work?
The buoyant force on it; W = mg = pVg
The lowest whole number ratio of moles of each element in a mole of a cmpd
T = 2pi/angular velocity; v/r
Vertically; perpendicular to all surfaces

37. If temperature arises during a mixture what can you conclude about the enthalpy?
Positron because this is known as positron decay/electron capture
Total internal reflection
That it is negative
When you have central atom with six ions on it

38. How do you find 'g' from Newton's law of gravity?
It can also equal 'mg'; the compressive strength of a substance
Well F = GmM/R^2 and force = mg so equating those together g = GM/R^2
Momentum
Isolating an atom from minerals by decomposing the minerals with an electric current

39. Pressure in a liquid is proportional to what? So why does this explain why blood pressure is greater in legs?
Its intensity in the spectrum
They are directly proportional
The height of the liquid above it ; blood pressure increases because of the force of gravity (P= (density)g(height)
The mass number stays the number but the atomic number decreases by one - usually resulting in another element

40. Why are bonds between H and another atom shorter compared to most?
Vertically; perpendicular to all surfaces
Decreasing potential energy
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting
H has a small atomic radius

41. How do you find moles of a substance when you are given faradays and electrons?
From peak to peak
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
Faraday/electrons
Voltage

42. Why would a solution with unfilled orbitals be responsible for turning a solution a certian color?
The cmpd without the O cannot donate H's like alcohol can to form H bonds with water
Alkali metals = first column
7 always!!!
It can absorb light that lets other electrons fill those orbitals

43. In radioactive decay the atomic number (A) and mass number (Z) must what?
H has a small atomic radius
B = pVg; density
They must balance
Dipole moment; the attractive forces holding them together in liquid state are London or dispersion forces

44. So if you have a voltage of 1/4V it will be reduced by what? Thus what will be the equation for the terminal voltage?
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
When electron falls from high energy to low energy level
It will be reduced the voltage produced by the resistor which means IR; E- IR
Until all of it has been melted because energy is going into it to melt it not to change temperature during its melting

45. Light can be carried along a distance within a transparent material by means of what?
Red
The Ka or Kb that has an exponent closest to 7 because pKa + pKb = pKw and pKw = 14
When you have central atom with six ions on it
Total internal reflection

46. If you have circuit elements in parallel what is the same across them?
Voltage
The lowest amt than any of the other cmpds with a higher carbon to oxygen ratio
F =ma and F= qE
It's weight = mg; h

47. 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?
Battery starts off chemical and creates an electrical current which creates thermal energy in the resistors
How strong a base is
1000
0 Hz because they are traveling side by side at the same speed

48. 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?
You look at what is being oxidized and reduced in the problem
The current is the same
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
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

49. The number of incident photons on the cathode affect what?
C: series = 1/C + 1/C = 1/C; parallel = C + C = C R: series: R+R = R; parallel = 1/R + 1/R = 1/R
The buoyant force on it; W = mg = pVg
When all the external forces = zero
The number of electrons emitted

50. What is weight equal to?
Helium; 4
Mg
P = F(v) = mg(v -terminal)
T = 2pi/angular velocity; v/r