A gas made up of atoms escapes through a pinhole 0.155 times as fast as h2 gas. write the chemical formula of the gas.

The volume of a container is 60 cm^3. It has a length of 5 cm and a width of 6 cm. What is the height of the container? A. 2 cm B. 30 cm C. 71 cm D. 2 cm^3

An automobile tire at 30°C has a pressure of 3.00 atm. Temperature decreases to - 5°C. Assume that there is no volume change in the tire. How does the tire pressure change in response to the temperature change?

Consider the specific heats h2o (s) = 2.09 j/g · ◦c, h2o (ℓ) = 4.18 j/g · ◦c, and h2o (g) = 2.03 j/g · ◦c. the heat of fusion for water is 334 j/g and its heat of vaporization is 2260 j/g.

A number of people became ill after eating oysters in a restaurant. Which of the following statements is a hypothesis about this occurrence? a. Everyone who ate oysters got sick. b. People got sick whether the oysters they ate were raw or cooked. c.

How much elements are in the periodic table?

A substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as (1) an ionic compound (2) a molecular compound (3) a metal (4) a nonmetal

What is done with the reactive sodium after the reaction to make sure the products are safe in an air bag?

Which of the following does not indicate a chemical change? precipitate formation crushing a solid into a powder color change gas evolution

Reactions cannot occur without a certain minimum amount of energy. what is this minimum amount of energy called?

What are the products of the alpha decay of Iodine-131?