Quiz4 chem - quiz 4 PDF

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quiz 4...

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To write a number in proper scientific notation, the coefficient should be greater than or equal to 1, but less than 10. TRUE Scientific notation is a convenient and accurate way to represent very large and very small numbers.

TRUE

Choose the answer that shows the following number correctly written in scientific notation. 430,000

4.3 x 10^5

What is the boiling point of water in the Celsius scale?

100∘C

What is the freezing point of water in the Celsius scale?

0∘C

Convert the following Kelvin temperatures to degree Celsius. 188 K = _____.−85∘C What is absolute zero on the Celsius temperature scale?

−273∘C

Another term sometimes used for the Celsius scale is ____ centigrade Two samples of matter differ in temperature by 20°C. What is the difference in temperature of these two samples using the Kelvin scale? The difference is ___ kelvin

20, 20 K(any of these)

Convert the following Kelvin temperatures to degree Celsius. 631 K = _____.358∘C The temperature of a substance is 329 K. What is the temperature in degrees Celsius (°C)? 56 °C A thermometer reads a temperature to be 38.0 °C. What is the temperature in Kelvin? (Kelvin = °Celsius + 273.15) ___ K 311.15

There are ___ degrees difference between the freezing and boiling points of water.

100

What are the freezing and boiling points of water on the Celsius temperature scale?

0 and

100 Two samples of matter differ in temperature by 20°C. What is the difference in temperature of these two samples using the Kelvin scale?

The difference is ___ kelvin

20

A man weighs 235.0 lbs. Express his weight in kg.

106.6

How many minutes are there in 3,417 seconds?

56.95

1.000 mile is equal to 1609 meters. A truck is traveling at 42.00 km/h. What is the speed of the truck in miles per hour? ___ mile/h.

26.1

A train is traveling at 50.0 miles per hour. 1 mile is equal to 1.61 kilometers. How fast is the train moving in meters per second? ___ m/s

22.4, 22.36, 22.36 m/s(any of these)

A train is traveling at 50.0 miles per hour. 1 mile is equal to 1.61 kilometers. How fast is the train moving in meters per second? ___ m/s

22.4

A train is traveling at 50.0 miles per hour. 1 mile is equal to 1.61 kilometers. How fast is the train moving in meters per second? ___ m/s

22.4

Given 1 in = 2.54 cm, how many centimeters are in an average hand (9.50 inches)?

___ cm (3 Significant figures) 24.13...