Practise questions...

[faerielynx]

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42. Which of the following solutions will be the
best conductor of electricity?
A. Glucose in water
B. Glucose in ethanol
C. Table salt in water
D. Table salt in ethanol

43. For the reaction between A and B to form C it
is found that when one combines 0.6 moles of
A with 0.6 moles of B, all of the B reacts, 0.2
moles of A remain UNREACTED and 0.4
moles of C are produced. What is the
balanced equation for this reaction?
A. A + 2B C
B. A + 3B 2C
C. 3A + 3B 2C
D. 3A + 2B 3C
E. 2A + 3B 2C

44. If the mass percent of oxygen in a nitrogenoxygen
compound is known, given the mass
percent of oxygen, all of the following are
needed to determine the molecular formula of
a nitrogen-oxygen compound EXCEPT one.
Which one is this EXCEPTION?
A. Atomic mass of nitrogen
B. Atomic mass of oxygen
C. Avogadro's number
D. Empirical formula
E. Molar mass of the compound

45. A 10.0 liter sample of oxygen at 100°C and 1
atm is cooled to 27° C and expanded until the
pressure is 0.5 atm. Find the final volume of
the oxygen.
A. (10.0)(1/5)(27/100)
B. (10.0)(1/5)(373/300)
C. (10.0)(.5/1)(373/300)
D. (10.0)(1/.5)(300/373)
E. (10.0)(.5/1)(300/373)

46. When the volume of a gas is decreased at
constant temperature, the pressure increases
because the molecules
A. move faster.
B. experience a lower density.
C. become heavier.
D. become greater in number.
E. strike the container more often.

47. Which of the following types of bonding is
found in a diamond?
A. Covalent
B. Hydrogen
C. Van der Waal’s
D. Metallic
E. Ionic

48. The least electronegative element can be
found in the
A. upper left corner of the periodic table.
B. upper right corner of the periodic table.
C. lower left corner of the periodic table.
D. lower right corner of the periodic table.

49. The molar volume of copper (63.5 gmol–1)
at 25oC is 7.09 cm3  mol–1. Which of the
following is the density of copper at 25oC in
g  cm3?
A. (63.5)/(7.09)
B. (63.5)(7.09)
C. (7.09)/(63.5)
D. 7.09

10. The introduction of a new manufacturing
process will effect a savings of $1,450.00 per
week over the initial 8-week production
period. New equipment, however, will cost ¼
of the total savings. How much did
equipment cost?
A. $11,600.00
B. $2,900.00
C. $725.00
D. $362.50
E. $181.25
11. An investment is made at r percent
compounded annually, at the end of n years it
will have grown to A = P(1 + r)n. An
investment made at 16% compounded
annually. It grows to $1,740 at the end of the
year. How much was originally invested?
A. $150
B. $278.40
C. $1,461.60
D. $1,500
E. $1,700

16. Which line is perpendicular to the x-axis?
A. x = 3
B. y = 3
C. x = y
D. x = y/3
E. y = x/3
17. The dental hygienist at a certain office is paid
H dollars a week. The dental assistant works
36 hours a week at A dollars per hour, and
the receptionist works 40 hours a week and
receives R dollars every other week. Which of
the following represents the weekly payroll for
these three employees?

28. Optometry school applicants decreased by
25% during a 4-year period. During the same
time, the number of first-year openings in
optometry school increased by 12%. If the
ratio of applicants to first-year student
openings had been 3 to 1, then which of the
following would be the approximate ratio at
the end of the 4-year period?
A. 1.5 to 1
B. 2 to 1
C. 3 to 2
D. 4 to 3
E. 6 to 5
E. ((63.5)/(7.09))(25)

 

[dantheman2007]

Are these Barron's problems?

 

[faerielynx]

dunno... past test takers say that these questions (extracted from multiple materials) look very similar to some of the questions asked on the real exam... If you guys can work it out for everyone to see, would be great!

 

[reliefe123]

i will try and attempt some....

42)good conductors are ionic compounds in aqueous solutions...so i would have to say nacl in water

44)in order to find the molecular formula of a compund you would need molar mass of the compund and the atomic mass of all of the substances. you dont need the empirical formula because sometimes, given the right question, you can get the molecular formula right off the bat. I have never used avagadros number to find the molecular formula!

45) pv/t=p2v2/t2
given.......v=10 liters v2=x
t=100+273=373 k t2=27+273=300k
p=1 atm p2=.5atm
plug it in the equation and you get
(10)(300/373)(1/.5)

46)as the volume of the gas decreases there is less room for the molecules and so they hit the container more often. This would then cause the pressure to increase becasue of the lack of space for the molecules to move in. I would have guessed moves faster BUT it is at constant temperature. and teh temperature increase would make the molecules move faster.

48) the least electronegative element is cesium and the most electronegative element is flourine

49) it is asking for density and density=m/v so....
63.05/7.09

I SUCK AT MATH
so the only question i got was
16 LOOOOL
the y axis is perpendicualr to the x axis...🙂

i could not really get the other cause i am not too sure what the answers would be..i have an idea...but i dont want to steer people the wrong way...

 

[reliefe123]

i have seen some of these questions on the practice booklet that the ada gave out and released to show what some dat questions actually look like...but i only recognized 1 or two

 

[Tommymkea]

For number 16. I think the correct answer is A.

B. would be parallel to the x-axis
C. would be a reflection of the two axes
D. and E. are just equations for the line of type y=mx+b

I haven't done these in a while, so correct me if I am wrong! 🙂

 

[Lily-VA]

42. c
43. c
44. c
45. d
46. e
47. a
48. c
49. a
10. b
11. c
16. b
27...no choices are written 🙂
28. dunno..I think it's around 5:2 there's no answer!haha..who knows?

What are the answers?

 

[sajjy]

42. Which of the following solutions will be the
best conductor of electricity?
A. Glucose in water
B. Glucose in ethanol
C. Table salt in water
D. Table salt in ethanol

43. For the reaction between A and B to form C it
is found that when one combines 0.6 moles of
A with 0.6 moles of B, all of the B reacts, 0.2
moles of A remain UNREACTED and 0.4
moles of C are produced. What is the
balanced equation for this reaction?
A. A + 2B C
B. A + 3B 2C
C. 3A + 3B 2C
D. 3A + 2B 3C
E. 2A + 3B 2C

44. If the mass percent of oxygen in a nitrogenoxygen
compound is known, given the mass
percent of oxygen, all of the following are
needed to determine the molecular formula of
a nitrogen-oxygen compound EXCEPT one.
Which one is this EXCEPTION?
A. Atomic mass of nitrogen
B. Atomic mass of oxygen
C. Avogadro's number
D. Empirical formula
E. Molar mass of the compound

45. A 10.0 liter sample of oxygen at 100°C and 1
atm is cooled to 27° C and expanded until the
pressure is 0.5 atm. Find the final volume of
the oxygen.
A. (10.0)(1/5)(27/100)
B. (10.0)(1/5)(373/300)
C. (10.0)(.5/1)(373/300)
D. (10.0)(1/.5)(300/373)
E. (10.0)(.5/1)(300/373)

46. When the volume of a gas is decreased at
constant temperature, the pressure increases
because the molecules
A. move faster.
B. experience a lower density.
C. become heavier.
D. become greater in number.
E. strike the container more often.

47. Which of the following types of bonding is
found in a diamond?
A. Covalent
B. Hydrogen
C. Van der Waal’s
D. Metallic
E. Ionic

48. The least electronegative element can be
found in the
A. upper left corner of the periodic table.
B. upper right corner of the periodic table.
C. lower left corner of the periodic table.
D. lower right corner of the periodic table.

49. The molar volume of copper (63.5 gmol–1)
at 25oC is 7.09 cm3  mol–1. Which of the
following is the density of copper at 25oC in
g  cm3?
A. (63.5)/(7.09)
B. (63.5)(7.09)
C. (7.09)/(63.5)
D. 7.09

10. The introduction of a new manufacturing
process will effect a savings of $1,450.00 per
week over the initial 8-week production
period. New equipment, however, will cost ¼
of the total savings. How much did
equipment cost?
A. $11,600.00
B. $2,900.00
C. $725.00
D. $362.50
E. $181.25
11. An investment is made at r percent
compounded annually, at the end of n years it
will have grown to A = P(1 + r)n. An
investment made at 16% compounded
annually. It grows to $1,740 at the end of the
year. How much was originally invested?
A. $150
B. $278.40
C. $1,461.60
D. $1,500
E. $1,700

16. Which line is perpendicular to the x-axis?
A. x = 3
B. y = 3
C. x = y
D. x = y/3
E. y = x/3
17. The dental hygienist at a certain office is paid
H dollars a week. The dental assistant works
36 hours a week at A dollars per hour, and
the receptionist works 40 hours a week and
receives R dollars every other week. Which of
the following represents the weekly payroll for
these three employees?

28. Optometry school applicants decreased by
25% during a 4-year period. During the same
time, the number of first-year openings in
optometry school increased by 12%. If the
ratio of applicants to first-year student
openings had been 3 to 1, then which of the
following would be the approximate ratio at
the end of the 4-year period?
A. 1.5 to 1
B. 2 to 1
C. 3 to 2
D. 4 to 3
E. 6 to 5
E. ((63.5)/(7.09))(25)

42) C
43) E
44) C
45) D
46) E
47) A
48) C
49) A
10) B
11) D
16) A
17) It should be (R/2)+36A + 40H
28) B
So, what r the answers??