How many moles of Cl - ions are needed to completely combine with 0.25 moles of Mg+2 ions?

Which statement is correct? ( a. electrons of a neutral atom always equal the number of protons, ( b. neutrons always equal the number of protons, ( c. neutrons always equal the number of electrons, ( d. atomic weight is identical to atomic mass.

How to obtain ethyl bromide from ethene

An acid and a base react to form salt and water. Which of the following best describes this type of chemical reaction? Redox Neutralization Double Replacement Single Replacement

How many ounces are in a liter?

2 different elements have the same number of neutrons

Calculate the voltage if the current is 0.5 A and the resistance is 2.0 Ω.

Moseley's changes to the periodic table were based mainly on what part of the scientific process

Which of the following precautions is important when using a Bunsen burner or Meker burner? a. Set up your work space so that wires and cables cannot accidentally make contact with the flame or hot glassware and meltb.

What explains the fact that no machine is 100 percent efficient? A. Friction transforms mechanical energy into thermal energy. B. Thermal energy is transformed into mechanical energy by friction. C.

For each example of a phase change, identify whether heat is absorbed from the surroundings or released into the surroundings. A popsicle melts on a hot day. Rubbing alcohol evaporates from the surface of the skin.