Chemistry and Measurements

Units & Conversions

100

A modification of the metric system used by scientists worldwide.

What is SI (International System of Units)?

200

What are the SI units for volume, length, mass, temperature, and time?

cubic meter, meter, kilogram, kelvin, and seconds?

300

Convert 120.35degreesC to Kelvin.

What is 393.50K?

(Add 273.15)

400

How many micrometers(μm) are in 2 meters?

What is 2,000,000μm?

(1m = 10⁶μm)

500

How many meters are in 300.0ft?

1ft = 12in

1in = 2.54cm

100cm = 1m

91.4m

Significant Figures

100

How many sig figs are in the following measurement: 500kg?

1

200

What types of numbers are significant figures?

(Hint: there are 4)

1. non-zeroes,

2. zeroes between non-zeroes,

3. zeroes at the end of a decimal number,

4. coefficients in scientific notation

300

How long is the blue rectangle? Give answer in the correct amount of sig figs. 

see img

7.85cm

(7.8-7.9cm)

400

Solve the following and give your answer to the correct significant figures:

2.305 + 0.0362

What is 2.341?

500

Solve the following and give your answer to the correct significant figures:

(12.8 - 9.12564) × 3.55

What is 13?

Density

100

What is the formula for density?

D = m/v

solids and liquids: g/cm³ or g/mL

gases: g/L

200

What is the density of water?

1.00g/mL

300

Formula and unit for specific gravity?

SpGr = density of sample / density of water

Units: none

400

A 2.0L container is filled with an unknown liquid of 2.3kg, what is the density of the liquid?

What is 1.2g/mL?

500

An unknown liquid has a density of 1.91g/mL, how many grams of it can a 10mL test tube contain?

What is 20g?

Misc.

100

A number obtained by measuring a quantity. 

What is a measured number?

200

What type of number is obtained through counting/definitions?

What is an exact number?

300

How is a coefficient in scientific notation written?

As a number between 1 and 10

400

What is water/volume displacement? Explain the process.

The water displacement method is the process used to determine the volume of an object that does not have a regular shape.

First, measure the mass of the object. Then, submerge the object in water so that it displaces water that is equal to its own volume.

Formula: mass / (final volume - initial volume)

500

A patient is prescribed 0.500ml/kg of medicine-X per kg of body weight. If the patient weighs 200.9lbs, how many ml of medicine-X should be administered?

1kg = 2.20lbs

What is 45.7ml?