Which relationship is always true for the angles x, y, and z of triangle ABC? x+z=y
y+z=x
x+y+z=180 degrees
x+y+z=90 degrees

Afamily is one another name for a group on the table of elements.

Which actions would increase the rate at salt dissolves in water? stir the water? crush the salt? use less water? heat the water? cool the salt

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: