Which phase change represents a decrease in entropy? (1) solid to liquid (3) liquid to gas (2) gas to liquid (4) solid to gas

How can one increase the rate of a chemical reaction? a. Decrease the concentration of the reactants. b. Add a catalyst. c. Increase the activation energy needed. d. Increase the entropy of the reactants. e. Cool the reactants.

A water sample consists of the following cadmium species and their percentages of the total cadmium concentration: Cd2 (36 %); CdHCO3 - (14 %); CdCl - (25 %); and Cd (OH) 2 (25 %). What percentage of Cd is toxic to aquatic organisms

What two effects might occur if most of the phytoplankton living in the world's oceans were destroyed?

Which means to come up with ideas to solve a problem? A) brainstorming B) predicting C) measuring

You have 500 mL of 5 M HCI already made. You need to dilute the solution to 1 M HCI. How much water will you need to add? a 2500 ml 062.01 CC 2.51 d 2.5 ml

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