Oxygen is composed of only one kind of atom and can’t be separated into simpler substances. what type of matter is it?
a. solution
b. element
c. mixture
d. compound
e. colloid

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

1.17 mol hcl and 2.5 mol naoh react according to the equation hcl + naoh -> nacl + h2o . if the limiting reactant is hcl, determine the amount of excess reactant that remains. answer in units of mol.