Question 10 a chemistry student adds a quantity of an unknown solid compound x to 150. ml of distilled water at 26.°

c. after 10 minutes of stirring, all of the x has dissolved. the student then drains off the solution and evaporates the water under vacuum. a precipitate is left behind. the student washes, dries and weighs the precipitate. it weighs 3.45 g .

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

__can be defined as which velocity changes

Calculate the molarity of 48.0 ml of 6.00 m h2so4 diluted to 0.250 l .