Stage in a star's evolution formed as the core of a main sequence star uses up its helium and the outer layers escape into space

When hydrogen ions combine with hydroxide ions the resulting molecule is considered?

What is the isotope notation for an element with an atomic number of 92 and 143 neutrons?

How is the compound sodium chloride different from the elements of which it is composed?

How does the average atomic mass of an element differ from the mass of an individual atom of the same element?

The formula for dichlorine monoxide

Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.0 L of water upon warming from 25 ∘C to 50 ∘C.

Washing soda, a compound used to prepare hard water for washing laundry, is a hydrate, which means that a certain number of water molecules are included in the solid structure.

When you light a fire place what energy transformation takes place

Correctly identify the generic formula for a synthesis reaction. a. AB + A+B b. A+B → AB c. CxHx + O2 → CO2 + H2O d. AB + C + AC + B e. AB + CD → AD + CB

Zinc phosphide, Zn3P2, is often used as a rat poison. Phosphorus has 5 valence electrons. How many valence electrons does each zinc atom lose?