A nonmetallic element x forms an ionic compound with sodium that has the formula na2x. the charge on the x ion must be

What happens when the action force of a bat strikes a baseball? The reaction force accelerates the bat in a direction opposite that of the ball. The reaction force accelerates the bat in a upward direction.

A compound that changes color when it is placed into an acidic or a basic solution is a compound that changes color when it is placed into an acidic or a basic solution is protonated. amphiprotic. an acid-base indicator. a buffer.

Which alternative energy source would be expected to be the least dependent upon the weather? a. wind power b. solar power c. geothermal d. none of the above

Which is a metal alloy? A iron, used for making nails, free weights, and ornamental garden fencing B silver nitrate, a chemical compound used to develop photographic film C neodymium, an element in the lanthanide series used for making headphones D

What is Loschmidt's number? How is it related to Avogadro's number?

02:Matter and Change What is one difference between a mixture and a compound? A. A compound can only be separated into its components by chemical means. B. A compound consists of more than one phase. C.

Charlotte is planning an investigation to learn how temperature affects the amount of salt that can be dissolved in a liquid. In Charlotte's experiment, which of the following things should she control, or keep the same? A. the type of liquid used B.

Which property ofsulphuric acid makes it suitable to use as a catalyst for the preparation of esters?

Which is an example of a covalent bond? Chlorine accepts an electron from calcium to form a stable bond. Ions in a bar of pure iron are surrounded by a large number of valence electrons.

Which frequency has more energy? (high frequency or low frequency)