The distance between two adjacent peaks on a wave is called the wavelength. The wavelength of a beam of ultraviolet light is 387 nanometers (nm). What is its wavelength in meters?

The area of a telescope lens is 6.962 10³ mm². (a) What is the area in square feet (ft²)? Enter your answer in scientific notation.

(b) If it takes a technician 54.7 s to polish 1.44 10² mm², how long does it take her to polish the entire lens?

The average density of a planet is 3.44 g/cm³. What is its density in kg/m³? (Enter your answer in scientific notation.)

The speed of light in a vacuum is 3.00 10⁸ m/s. Enter your answer in scientific notation. (a) What is its speed in km/h?

(b) What is its speed in mi/min?

How many cubic meters of milk are in 5.86 qt (1 qt = 946.4 mL)? Enter your answer in scientific notation.

Write the following number in standard notation, using a terminal decimal point when needed: 6.2752 10³.

Round off the number to the indicated number of significant figures (sf): 144,000 (to 2 sf)

Round off the number to the indicated number of significant figures (sf): 231.554 (to 4 sf)

Write the following number in standard notation, using a terminal decimal point when needed: 1.43 10⁵.

Write the following number in standard notation, using a terminal decimal point when needed: 3.700 10³.

Write the following number in standard notation, using a terminal decimal point when needed: 4.5 10³.

An empty Erlenmeyer flask weighs 258.6 g. When filled with water (d = 1.00 g/cm³), the flask and its contents weigh 554.1 g. (a) What is the volume of water in the flask? Enter your answer in scientific notation

(b) How much does the flask weigh when filled with the same volume of chloroform (d = 1.48 g/cm³)?

Carry out the following calculation, paying special attention to significant figures, rounding, and units:

(2.03 10⁴ mol/L)²(3.5 10³ mol/L)

(7.41 10⁵ mol/L)(2.01 10² mol/L)3

= 10L/mol