Which of the following describe objects in free fall? Check all that apply. A. An apple falling from a tree B. A dog that is running C. A rock that is dropped D. A bee that is flying

What element in the fourth period is an exception to the Aufbau principle?

Which of the following is equal to 4 kilograms? A. 4,000 mg B. 4,000 g C. 40 g D. 4,000 cg

Which state of matter has no define volume or definite shape but expands to fill the available volue of s container?

What mass of NaCN must be added to create 250.0 mL of a buffer solution with a pH = 9.00 and an HCN concentration of 0.100 M? The pKa of hydrocyanic acid is 9.31.

What is a physical combination of substances? A. a compound B. a molecule C. a mixture D. an element

A pharmacist measures the mass of a powdered drug. The mass is 506 mg. What is the mass in grams? Write your answer as a decimal.

Which of these is a source of sediment? A. Fragments if other rocks B. Chemicals and minerals dissolved in water C. Sea shells D. All of the above

Entropy is greater at higher trophic levels than at lower levels ... True of False

If the caffeine concentration in a particular brand of soda is 2.85 mg/oz, drinking how many cans of soda would be lethal? Assume that 10.0 g of caffeine is a lethal dose, and there are 12 oz in a can.

Suppose that your favorite AM radio station broadcasts at a frequency of 1600 kHz. What is the wavelength in meters of radiation from the station? (Hint: convert kHz to Hz and find frequency first.)