Any atom, ion, or molecule that can donate a pair of electrons to form a covalent bond is called

This element has more than 25 but less than 50 protons, and it is a halogen.

What are produced by the process of cellular respiration?

How many grams are produced when 2.3moles of water is synthesized from hydrogen and oxygen gas.

Bella is writing a research paper on ocean currents. Which two sources should she consult?

When 2.5000 g of an oxide of mercury, (hg soy) is decomposed into the elements by heating, 2.405 g of mercury are produced. calculate the empirical formula?

A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. Which term most likely describes what she is measuring?

How would you expect energy to change during a chemical reaction? A. Energy will be increased. B. Energy will be decreased. C. Energy will be converted into another form. D. Energy will be consumed.

In the formula for the compound xcl4 the x could represent

What is the main function of antibodies? A: "Remembering" the characteristics of germs that have invaded your body in the past B: Creating new white blood cells C: binding themselves to invading antigens D:Signaling your immune system that antigens

In the reaction 2H2O (l) + 2Cl - (aq) → H2 (g) + Cl2 (g) + 2OH - (aq), which substance is reduced? A. H2O B. Cl C. H D. OH E. None of the Above (This is not a redox reaction.)