Which of the following is NOT a chemical reaction?

1. Fireworks exploding

2. Baking a cake

3. Shattering glass with baseball

4. Lighting a match

A chef fills a 50 mL container with 43.5 g of cooking oil. what is the density of the oil?

What is the power output of a hand grenade

If sulfur dioxide and oxygen can be made into sulfur trioxide, what is the reverse reaction?

1. You have three elements, A, B, and C, with the following electronegativity values: A = 0.9 B = 3.0 C = 3.5 You react the elements to form the substances AB, AC, and BC.

What is the energy of a photon of infrared radiation with a frequency of 2.53 * 1012 Hz? Planck's constant is 6.63 * 10-34 J • s. A. 1.68 * 1023 J B. 1.68 * 1047 J C. 1.68 * 10-21 J D. 1.68 * 10-45 J

Witch compound has an element ratio of 2:1

Consider the total ionic equation below. 2 upper N upper H subscript 4 superscript plus, plus 2 upper O upper H superscript minus, plus 2 upper H superscript plus, plus upper S upper O subscript 4 superscript 2 minus right arrow 2 upper N upper H

Which of the following is true regarding phase changes? A. Condensation is the reverse of evaporation. B. Melting is the reverse of deposition. C. Freezing is the same as sublimation. D. Sublimation is the same as boiling.

Which of the following adaptations to life on land is found in both insects and modern reptiles? A. metamorphosis from a larval form B. body surfaces that resist evaporation C. tracheae to distribute oxygen D. ability to fly E.

Draw the correct structural formula for the following compounds: (be sure to include the hydrogen atoms where required) a) 2-pentene b) 2,3-diethyl-3,5-dimethylhexane c) 4-ethyl-2,6-dimethyl-2-heptene