How many protons are contained in the nucleus of an argon atom?
A.9
B.18
C.36
D.40

Determine the empirical formula of a compound containing 40.6 grams of carbon, 5.1 grams of hydrogen, and 54.2 grams of oxygen. in an experiment, the molar mass of the compound was determined to be 118.084 g/mol. what is the molecular formula of the compound? for both questions, show your work or explain how you determined the formulas by giving specific values used in calculations.

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

What is the percentage of hydrogen in nitrogen trihydride