Exam 1: Units of Measurement for Physical and Chemical Change

The density of air under ordinary conditions at 25° C is 1.19 g L^-1.How many kilograms of air are in a room that measures 12.0 $\mathrm { ft } \times 12.0 \mathrm { ft }$ and has a 11.0 ft ceiling? $( 1 \mathrm { in } . = 2.54 \mathrm {~cm}$ (exactly); $1 \mathrm {~L} = 10 ^ { 3 } \mathrm {~cm} ^ { 3 }$ )

Molecules can be described as

What answer should be reported,with the correct number of significant figures,for the following calculation? (249.362 + 42)/ 63.498

If an object has a density of 8.65 g cm^-3,what is its density in units of kg m^-3?

What wavelength of light would you report in units of nm if the light had a wavelength of 7.60 × 10^-10 m?

Convert 35 m³ to litres.

How many significant figures are there in the answer to the following problem? 56.4 + 0.8822 + 21

Convert 4392 m³ to hm³.

If a car gets 43.0 miles per gallon (mpg)fuel efficiency,calculate the fuel efficiency in litres per 100 km.(1 US gal = 3.78541 L; 1 mile = 1609.34 m)

Which of the following is an example of intensive properties?

I'm on a boat.It is travelling at 5.0 knots.What is the velocity in m s^-1? (1 knot = 1.15078 miles per hour; 1 km = 0.6214 miles)

How many cm are in 22.2 ft?

If the melting point of vanadium metal is 1910 °C,what is its melting point in kelvin?

How many mm are in 3.20 cm?

If the speed limit on a highway is 100 km h^-1,what is the speed limit in m h^-1?

Convert 12.5 μL to L and express it in scientific notation.

What answer should be reported,with the correct number of significant figures,for the following calculation? -log(3.28 × 10^-3)

If 1.4% of the mass of a human body is calcium,how many kilograms of calcium are there in a 185-pound man?

A student weighed 30.00 μg of sulfur in the lab.This is the same mass as

Which of the following is an example of physical change?