Determine the number of moles of hydrogen atoms when you are given 2 moles of water.

Use the periodic table to answer the following questions: Atoms of which element contain 25 protons? magnesium (Mg) aluminum (Al) tin (Sn) manganese (Mn) Which element has an atomic number of 16? oxygen (O) sulfur (S) germanium (Ge)

For which one of the following is ΔHfo zero? A. O (g) B. Na (s) C. CO2 (s) D. N2 (l)

Elemental boron is produced in one industrial process by heating diboron trioxide with magnesium metal, also producing magnesium oxide as a by-product. write the unbalanced equation for this reaction.

An atom has three full orbitals in its second energy level. How many electrons are present in the second energy level of the atom? 6 12 3 9

Something that is the product of mixing two or more different things

Which word is the longest word in chemistry?

0.0000250 m in scientific notation

Why would concentrated hydrochloric acid be a poor choice as the acid catalyst for the formation of cyclohexane by dehydration of cyclohexanol

Within the main group of elements, what do elements in a family have in common? same number of energy orbits same number of protons same number of valence electrons same atomic radius

What is 33. 19 G to mg