Converting Units

Dimensional analysis, SI units, metric prefixes, conversion factors, scientific notation, temperature conversions, density-related measurements, and important vocabulary used in chemistry measurements.

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QUESTION OF

Views #: 17

Questions #: 33

Pass Score: 80.0%

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What is a conversion factor in chemistry?

1 pts

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A type of chemical reaction

A ratio equal to one used to change units

A measurement tool

A unit prefix

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Explanation

What is the SI base unit for length?

1 pts

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gram

meter

liter

second

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What is the SI base unit for mass?

1 pts

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gram

kilogram

milligram

pound

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The prefix kilo- means

1 pts

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100

1,000

0.01

0.001

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The prefix milli- represents

1 pts

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10⁻¹

10⁻²

10⁻³

10³

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Convert 325 cm to meters

1 pts

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0.325 m

3.25 m

32.5 m

3250 m

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Convert 2.45 m to millimeters

1 pts

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24.5 mm

245 mm

2450 mm

24500 mm

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Dimensional analysis is best described as

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Estimating measurements visually

A method of using units to solve problems

Measuring chemical reactions

Balancing equations

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What is the SI base unit for temperature?

1 pts

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Fahrenheit

Kelvin

Rankine

Celsius only

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Convert 25°C to kelvin

1 pts

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248 K

273 K

298 K

325 K

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A derived unit is

1 pts

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A basic SI unit

A unit formed from combinations of base units

A unit used only in chemistry

A temperature unit

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Explanation

Convert 3.75 L to milliliters

1 pts

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0.00375 mL

37.5 mL

375 mL

3750 mL

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Scientific notation is useful because it

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Avoids all unit conversions

Makes very large and small numbers easier to work with

Measures temperature

Converts liquids into solids

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Convert 5,500 g to kilograms

1 pts

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0.55 kg

5.5 kg

55 kg

550 kg

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In dimensional analysis, units that appear in both the numerator and denominator are

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Estimated

Rounded

Canceled

Squared

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Convert 4500 mg to grams

1 pts

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0.45 g

4.5 g

45 g

450 g

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What does SI stand for in measurement systems?

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Scientific Index

System International

Système International

Standardized Instruments

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Convert 2.5 hours to minutes

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25 min

150 min

250 min

600 min

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Convert 8.5 minutes to seconds

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51 s

85 s

510 s

850 s

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Density is defined as

1 pts

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Mass divided by volume

Volume divided by mass

Mass multiplied by temperature

Length divided by time

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Explanation

Metric Prefix Match

2 pts

Match each metric prefix with its value.

To complete the line match

Click on an item in the first group
Click on the match in the second group

To delete a match, double click on a line

prefix

kilo

centi

milli

value

1000

0.01

0.001

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Classify the following as either SI base units or derived units

2 pts

drag and drop the selected option to the right place

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Convert Inches to Centimeters

1 pts

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Using the conversion factor \( 1\text{ in} = 2.54\text{ cm}\ \), convert 10 inches to centimeters.

2.54 cm

25.4 cm

254 cm

2540 cm

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Convert 3.5 feet to inches

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12 in

24 in

36 in

42 in

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Write 0.000072 in scientific notation

1 pts

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7.2 × 10²

7.2 × 10⁻²

7.2 × 10⁻⁵

72 × 10⁻⁶

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Complete the conversion setup

2 pts

\[ 2500\text{ mg} \times \frac{\Box}{1000\text{ mg}} \]

Answer = (1)

Please drag and drop the selected option in the right place or type it instead

1 g

1 kg

100 g

1000 g

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Explanation

Arrange the steps for solving a dimensional analysis problem

2 pts

Please drag and drop the options to sort them

Cancel units

Choose a conversion factor

Multiply the values

Write the original measurement

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Explanation

Estimate the liquid volume shown in the graduated cylinder

2 pts

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20 mL

25 mL

30 mL

35 mL

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Accuracy refers to

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How close measurements are to each other

How close a measurement is to the true value

The size of the measuring tool

The number of unit conversions

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Precision refers to

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How close measurements are to one another

How close measurements are to the true value

The largest measurement possible

The smallest unit used

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Which of the following conversions are correct?

2 pts

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1 m = 100 cm

1 kg = 1000 g

1 L = 1000 mL

1 cm = 1000 mm

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Enter the formula used to calculate density

2 pts

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Which statement best describes dimensional analysis?

1 pts

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It is a way to estimate values without calculations

It uses units and conversion factors to solve problems

It only works with temperature conversions

It replaces scientific notation

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Explanation

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