January 2013 Chemistry Regents #41-50
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Other Regents Exams
41 Given the balanced equation representing a reaction:
Which type of reaction is represented by this equation?
|4||Link||Nuclear reactions with 2 reactants
42 A 220.0-mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275 K. The piston is pushed in until the sample has a volume of 95.0 mL. The new temperature of the gas is 310. K. What is the new pressure of the sample?
(1) 5l.1 kPa
(2) 216 kPa
(3) 243 kPa
(4) 274 kPa
|4||Link||Use combined gas law
|43 Given the cooling
curve of a substance:
During which intervals is potential energy decreasing and average kinetic energy remaining constant?
(1) AB andBC
(2) ABand CD
(3) DEand BC
(4) DEand EF
|3||Link||phase changes, plateaus, potential energy changes
44 Which metal will spontaneously react with Zn2+(aq), but will not spontaneously react with Mg2+(aq)?
|1||Link||Table J, above Zn but below Mg|
45 Which particle diagram represents the arrangement of F2 molecules in a sample of fluorine at 95 K and standard pressure?
|2||Link||Use Table S to determine phase of F2 at 95K
Boiling point is 85K so it is a gas
also F2 is diatomic
|46 Given the
formulas of four organic compounds:
Which compounds have the same molecular formula?
(1)A and B
(2) Aand C
(3) D and B
(4) D and C
|2||Link||count each atom|
|47 Given the
incomplete equation representing a reaction:
What is the formula of the missing product?
(1) O2-(3) OH-
(2) O2 (4) OH
|3||Link||find the missing atoms and make sure charge in equals charge out|
|48 Given the
equation representing a reaction where the masses are expressed in
atomic mass units:
Which phrase describes this reaction?
(1) a chemical reaction and mass being converted to energy
(2) a chemical reaction and energy being converted to mass
(3) a nuclear reaction and mass being converted to energy
(4) a nuclear reaction and energy being converted to mass
nuclear fusion mass converts to energy
|49 Given the diagram
representing a process being used to separate the colored dyes in food
Which process is represented by this diagram?
(1) chromatography (3) distillation
(2) electrolysis (4) titration
|1||Link||that's chromatography, you did it in bio or middle school|
|50 Given the diagram
representing a reaction:
According to one acid-base theory, the water acts as
(1) a base because it accepts an H+ (3) an acid because it accepts an H+
(2) a base because it donates an H+ (4) an acid because it donates an H+
|1||Link||the water gains H+ and is therefore a base|
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