Although electrons have mass, they are not considered in determining the mass number of an atom. Why?

Suppose that 0.290 mol of methane, CH4 (g), is reacted with 0.440 mol of fluorine, F2 (g), forming CF4 (g) and HF (g) as sole products. Assuming that the reaction occurs at constant pressure, how much heat is released?

A reaction produces 0.867 moles of h2o. how many molecules are produced?

Which of the following is the correct name for the compound HF? Hydrogen floride hydrogen monofloride Hydroflorous acid Hydrofloric acid

What concentration of so32 - is in equilibrium with ag2so3 (s) and 9.50 * 10-3 m ag? the ksp of ag2so3 can be found here?

What is your displacement if you walk 80 m north, 15 m east, 20 m south, 35 m west, and then 60 m south?

Why do atoms share electrons in covalent bonds?

Fission of U-235 can produce: A. Krypton B. Strontium C. Barium D. Xeonon E. All of the above

How does an object become negatively charged? It gains electrons. It loses electrons. It gains protons. It loses protons.

TRY H Vele Elements y Llectron Configurations for P-Block Use the periodic table to determine the electron configuration for aluminum (AI) and arsenic (As) in noble-gas notation A [Ar]352301 [He1232206352301 [Ne]3:23p1 [Ne]352302

If you measure the mass of a model car to be 230 grams. the actual mass is 218 grams. what is your percent error.