How many moles of sodium hydroxide would have to be added to 225 mL of a 0.418 M hydrofluoric acid solution, in order to prepare a buffer with a pH of 3.290?

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space