What do elements Be, Mg, Ca have in common

Increasing the volume of a given amount of gas at constant temperature causes the pressure to decrease because A. the molecules are more spread apart. B. there are fewer molecules. C. the molecules are moving more slowly. D. there are more molecules.

How many mol of table salt (NaCl) are in a 238 g box? 4.07 x 100 mol NaCl 9.74 x 10-23 mol NaCl 1.39 x 104 mol NaCl 2.04 x 100 mol NaCl

A 3.2-gram sample of air contains 0.000 74 gram of hydrogen cyanide. Determine the concentration, in parts per million, of the hydrogen cyanide in this sample.

The combustion of propane (C₃H₈) produces 2220 kJ of energy per mole of propane consumed. How many grams of propane will be required to heat 67.0 gal of bathtub water from 25.0°C to 35.0°C if the process is 80.0% efficient? (1 gal = 3.

Brock brings a magnet near a metal object. a magnetic force acts on an object, pulling it upward. which of the following best describes the magnetic force?

How do you convert from moles to atoms

What is the smallest unit of a chemical compound that still has the properties of a compound?

Is dam natural or made up by a people

What is the conservation of mass

What happens to the temperature as one progresses through the layers of the earth from lithosphere toward the outer core?