A bird sitting on a tree flies away as you walk by. Which of the characteristics explains the bird's behavior?

21. Draw Lewis structure Lewis structures for each of the followi olecules. (Hint: See Sample Problem D.). a contains one C and four F atoms b. contains two H and one Se atom c. contains one N and three I atoms d.

Which of the following electromagnetic waves has the highest energy? a. ultraviolet waves b. infrared waves c. microwaves d. radio waves

When the temperature is OFF and the volume plunger is at 1000 mL, what value is the pressure?

Why is the brcl molecule polar? the shared electrons are closer to cl due to the greater electronegativity of chlorine. bromine has a large positive nucleus. three-dimensional geometry is asymmetrical.

How much heat, in calories, is given off when 1.25 grams of silver is cooled from 100.0 degrees Celsius to 80 degrees Celsius? (The specific heat of silver is 0.057 cal/g degrees Celsius)

If a sample of copper with a density of 8.90 g/cm3 displaces 13.0 mL of water when placed in a beaker, what is its mass? a 1.46 g b. 0.685 g c. 116 g

Which statement accurately describes the origin and expansion of the universe

Conversion. 5 km to inches

How many kilojouls are required at 0c to melt an ice cube with a mass of 25g

Which substance is the oxidizing agent in this reaction? 2CuO+C→2Cu+CO2 Express your answer as a chemical formula.