Free Printable CHemistry Unit 7 Dimensional Analysis Practice

1.

What will the resulting units be?

a)

inches

b)

feet

c)

meters/ft

d)

inches/ft

2.

What will the resulting units be?

a)

cubic feet per day

b)

gallons per day

c)

gallons per hour

d)

cubic feet per hour

3.

What will the resulting units be?

a)

cups per day

b)

pints per hour

c)

cups per week

d)

pints per day

4.

Convert 354 grams to kg

a)

0.354 kg

b)

3.54 kg

c)

35400 kg

d)

3540 kg

5.

Convert 26.2 m/s to km/hr

a)

94.32 km/hr

b)

3.41 km/hr

c)

2.64 km/hr

d)

0.98 km/hr

6.

How many hours are in a fortnight (2 weeks)?

1 week = 7 days; 1 day = 24 hours [Note: do not round answer]

a)

672 hours

b)

168 hours

c)

336 hours

d)

504 hours

7.

How many decades are equal to 1.7 x 10²⁵ minutes? Round your final answer to 2 sig figs.

(60 min = 1 hour; 24 hours = 1 day; 7 days = 1 week; 52 weeks = 1 year; 10 years = 1 decade)

a)

3.2 x 10¹⁸ decades

b)

3.2 x 10¹⁹ decades

c)

1.2 x 10²² decades

d)

2.3 x 10²⁰ decades

8.

On Dr. Davis' bookshelf, there are 23 science textbooks, each with an average of 31 chapters. If each chapter contains 5 pages, how many total pages are there? (Round your answer to 2 sig figs)

a)

3.6 x 10⁴ pages

b)

36 pages

c)

3.6 x 10² pages

d)

3600 pages

9.

A newborn baby eats 8 times a day. At each feeding, he eats 2.5 ounces of formula. How many days will it take

for the baby to eat 1000 ounces? (do not round your answer)

a)

50 days

b)

400 days

c)

32 days

d)

312 days

10.

Jonathan raised 60 goats, then he traded all the goats for sheep at an exchange rate of 5 goats for 7 sheep. Next, he exchanged all the sheep for hogs at a rate of 4 sheep for 2 hogs. How many hogs did he get?

a)

62 hogs

b)

42 hogs

c)

84 hogs

d)

86 hogs

11.

You roof has a leak. If it leaks at a rate of 14 drops per minute, how many hours will it take to fill a 5 gallon bucket? (20 drops = 1 mL; 30 mL = 1oz; 64 oz = 1 gal) [Round answer to 2 sig figs]

a)

230 hours

b)

950 hours

c)

190 hours

d)

1900 hours

12.

What is the first step when solving dimensional analysis problems?

a)

Write your plan

b)

Put your "known" in top front

c)

Identify your "known" and "unknown"

d)

Cross out units that are opposite each other

13.

What is the second step when solving dimensional analysis problems?

a)

Write your plan

b)

Put your "known" in top front

c)

Identify your "known" and "unknown"

d)

Cross out units that are opposite each other

14.

What is the third step when solving dimensional analysis problems?

a)

Write your plan

b)

Put your "known" in top front

c)

Identify your "known" and "unknown"

d)

Cross out units that are opposite each other

15.

Because our goal in life is to make other people better, you get paid $5.00 every time you do something nice for someone else. You do a minimum of 25 nice things everyday for 1 year. How much money would you make a year?

a)

$45, 625

b)

$1,820

c)

$1,826

d)

$45,600

16.

You never learned dimensional analysis so you have been working at a fast food restaurant for 35.0000 years wrapping burgers. Each hour you wrap 184 burgers. You work 8 hours per day, 5 days a week. How many burgers have you wrapped? (1 year --> 52 weeks)

a)

13,395,200 burgers

b)

18,753,300 burgers

c)

40,185,600 burgers

d)

56,259,800 burgers

17.

You have traveled 125 miles, and you know that your average speed is 8 miles per hour. How would you represent miles/hour in dimensional analysis set up?

a)

$\frac{125\ miles\ \left|\ 1\ hr\ \ \ \ \right|}{\ \ \ \ \ \ \ \ 1\ \ \ \ \ \ \ \ \ \left|\ 8\ miles\ \right|}$

b)

$\frac{125\ miles\ \left|\ \frac{8miles}{hour}\right|}{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 1\ \left|\ \ \ \ 1\ \ \ \ \ \ \ \ \right|}$

c)

$\frac{125\ miles\ \ \left|\ 8\ miles\right|}{\ \ \ \ \ 1\ \ \ \ \left|1\ hr\right|}$

d)

$\frac{\ \ \ \ \ \ \ \ \ \ 8\ miles\left|\ \ \ \ 1\ \ \ \ \ \ \ \ \ \ \ \ \right|}{1\ hr\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \left|\ \ \ 125\ miles\right|}$

CHemistry Unit 7 Dimensional Analysis Practice

Total questions: 17

Worksheet time: 28mins

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