How does the entropy change in the reaction 2C2H2 (g) + 5O2 (g) 4CO2 (g) + 2H2O (l) ?

A. The entropy increases.

B. The entropy stays constant.

C. The entropy decreases.

D. It is impossible to tell.

Which atomic model did Rutherford propose based on the results of his experiments with gold foil? A - An indivisible ball of matter B - Negatively charged electrons set in a positive sphere C - Mostly empty space but having a dense, positive center

7. Which of the following does not use echolocation? a. Dog b. Bat c. Dolphin d. Submarine

How does the volume of an ideal gas at constant pressure change as the temperature increases?

Atoms are made up of subatomic particles. Which of the following statements is true about subatomic particles? * A) Electrons are negatively charged and are the heaviest subatomic particle.

To be useful a chemical equation must be balanced what does this mean

The atomic mass of fluorine in 19.0 amu, so the molar mass is?

A rod shaped organism with no nucleus commonly found in Garbage will most likely belong to which kingdom

Alka-Seltzer is a solid mixture of two substances, sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7). The substances react to form water, carbon dioxide (CO2), and Na3C6H5O7.

Four properties of water are listed. 1. It is colorless and odorless in its pure form. 2. It reacts with metals to form metal hydroxide and hydrogen gas. 3. When heated to 100 °C, water evaporates. 4. It decomposes to form hydrogen and oxygen.

Water is A. Acidic B. Basic C. Neutral