True or false: during dry weather, the water level in a small pond drops because of runoff.

Ammonium perchlorate (NH4ClO4) is a solid rocket fuel used in space shuttles. When heated above 200°C, it decomposes to a variety of gaseous products, of which the most important are N2, Cl2, O2, and water vapor

Imagine that you are going on an airplane trip in an unpressured plane. You are bringing aboard an air-filled pillow that you have inflated fully. Predict what will happen when you try to use the pillow while the plane is at its cruising altitude

What is an indicator that a chemical change has occurred?

A gas with a volume of 4.0 L at 90.0 kPa expands until the pressure drops to 20.0 kPa. What is its new volume if the temperature doesn't change?

What does a geologist study

Determine the pH of a 0.350 M solution of HA. The pkb of A - is 12.830.

Which statement is true about oxygen-17 and oxygen-18?

A man is making chicken noodle soup and has found it to be too salty. What method could he use to make the soup less salty? a. Add equal measured amounts of water to the soup. b. Bring the soup to a boil so that some of the broth evaporates. c.

A solution of H2SO4 (aq) with a molal concentration of 3.97 m has a density of 1.216 g/mL. What is the molar concentration of this solution?

How can you chose values for x when making a table of values representing a real world situation?