What is the empirical formula for a sample containing 81.70% carbon and 18.29% hydrogen? a. chb. ch3c. c2h6d. ch4e. c3h8?

What is the temperature of a 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals? (given: r = 8.314 l · kpa/k · mol)

List four properties of a candle

Desert plants have to adapt to a harsh environment. Many desert plants such as the rabbitbrush have small leaves, why?

A pocket of gas is discovered in a drilling operation. The temperature of the gas is 498º C and its pressure is 13.8 atm. At the surface, the same gas has a volume of l8.0 L at 29º C and 2.00 atm.

The population of the world nearly doubled between the years of 1965 and 2000. O False O True True

Penny bought a club moss plant for her water garden. She needs to know how tall the plant will grow so she knows how much space it will need.

Which of the following is not a producer? Mushroom Tulip Grass Pine Tree

Phosphorus forms a number of oxohalides, x3po, in which x may be a f, cl, or br atom. the most common of these, phosphoryl chloride, is obtained as follows:

Which statement is true about the speed of light waves in a medium? a. Depends on the temperature of the light wave b. Decreases with a decrease in density of medium c. Decreases with an increase in density of medium d.

What's a certain indicator that a molecule is polar? the molecule has a nonpolar covalent bond and the dipole is cancelled due to symmetrical arrangement of atoms the molecule has a polar covalent bond and the dipole is cancelled due to symmetrical