Helium has two protons, two neutrons and two electrons. what is the charge of this atom?

a. 0

b. 2

c. 4

d. more information is needed.

Formic acid, HCHO2, burns in oxygen to form carbon dioxide and water as follows: HCHO2 (aq) + O2 (g) → 2 CO2 (g) + 2 H2O (l). If a 3.15-g sample of formic acid was burned in 2.

Convert 4.0 kilometers 2 meters

What volume is represented by each small tick

What is the correct name for NC13? (a) trinitrogen chloride (b) mononitrogen chloride (c) nitrogen trichloride (d) nitride trichloride (e) mononitride chloride

Explain why the symbol for an atom of the element oxygen and the formula for a molecule of oxygen differ.

A researcher wants to test the solubility (property of being dissolved) of salt in water as the temperature of the water increases.

If you have three moles of S2, how many moles of Al2S3 can be produced?

Predict whether each of the following reactions will occur in aqueous solutions. Explain your reasoning in each case. Note: Barium sulfate and silver bromide precipitate in aqueous solutions.

The digestive system is the body system that Text to speech A:A. breaks down food into substances that can be absorbed and used for energy. B:B. gets rid of the remaining solid waste that cannot be absorbed. C:C.

What kind of molecule is water? A. nonpolar B. ionic C. polar D. charged