Chemistry Ch 1 Matter and Energy : 1.12 Dimensional Analysis (Knewton)

What is 250.00 K in Celsius? Use −273.15∘C for absolute zero.

-23.15*C

The temperature of a substance changes by 1K. This is equal to a temperature change of ________? A. 1∘C B. 1∘F C. 273∘C D. 273∘F

C. 273∘C

Absolute zero in Celsius is −273.15∘C. Convert this to degrees Fahrenheit. Do not include units in your answer.

-459.67

What conversion factor is used to convert a quantity measured in milligrams to grams? *Enter your answer as a fraction.

1/1000 g/mg

Light travels at roughly 3.00×108m/s. What is this speed in miles per minute? *Use 1mi=1609.344m and 60s=1min. *Report your answer in scientific notation with three significant figures.

11,200,000 miles per minute

Express 100 km/hr in meters per second. Report your answer with three significant figures. Do not include the units in your response.

27.8 meters per second

What is 0.29 km in mm? Report your answer with two significant figures.

290000 mm

If a car gets 45.00 miles per gallon, and gas costs $2.95 per gallon, about how far can you get with $200? Report your answer with four significant figures.

3051 miles

Johnny's bakery has 30,900 grams of sugar. A recipe calls for 32 pounds of sugar to be used. How much sugar will be left over? (1 lb=453.59 g). Report your answer with two significant figures.

36 lbs.

At what temperature does water boil in Kelvin and in Fahrenheit?

373.15K and 212*F

A thermometer reads 25∘C. If the temperature in the room is then increased by 16 K, what temperature will the thermometer read, in degrees Celsius? Round the answer to two significant figures (round to the nearest whole number).

41 degrees Celsius

An object has a mass of 0.0124kg and a volume of 1893mm^3. What is its density in grams per cubic centimeter? Your answer should have three significant figures.

6.55 grams per cubic centimeter

How many cups are in a 2.00 L bottle of soda? (4.00 cups=0.950 L) Round the answer to three significant figures.

8.42 cups

Which of the following temperatures are equivalent to absolute zero (0 K)? Select all that apply. A. 74.93∘F B. −100∘C C. −273.15∘C D. −459.67∘F

Both C & D C. −273.15∘C D. −459.67∘F

Which of the following factors used in a dimensional analysis calculation have a finite number of significant figures (in other words, they are not exact numbers) that might limit the precision of the calculated value? A. A conversion factor for time of (60 min/1 hour) B. A conversion factor for distance of (1000 m/1 km) C. A measurement of speed equaling (27.7 km/hour) D. None of the above

C. A measurement of speed equaling (27.7 km/hour)

Which of the following is the SI unit for temperature? A. ∘F B. ∘C C. K D. None of the above

C. K