An atomic mass unit is equal to a. one-half the mass of a hydrogen atom. b. one-fourth the mass of a lithium atom. c. one-twelfth the mass of a carbon-12 atom. d. one-fifteenth the mass of a nitrogen-15 atom.

2Mg + O2 forms the compound magnesium oxide (2MgO). How many molecules of magnesium oxide are represented? three four one two

Na, Rb, S, Cl rank the atoms from largest to smallest electronegativity. to rank items as equivalent overlap them.

What best describes why a liquid needs a container when a solid does not?

This photo shows a plateau in eastern canada. which events could have caused this plateau to form? select the three correct answers

How many atoms are present in 3588.3 amu of Al?

Give the four symbols for physical states of reactants and products, and tell what each means.

Which element is more electronegative, sulfur or nitrogen?

How does igneous rock become metamorphic rock?

The atomic mass oftitanium is 47.88 atomic mass units This atomic mass represents the 1) total mass of all the protons and neutrons in an atom of Ti 2) total mass of all the protons, neutrons, and electrons in an atom of Ti 3) weighted average mass

How many milliliters of. 45m hcl will neutralize 25ml of 1m koh?