Zachary adds 26.45 g to 2.55 g. how many significant figures should his answer have? twothreefourfive

Arock can be broken down into different kinds of substances by physical processes. no chemical reactions are needed to separate different parts of a rock into pure substances. this is because a rock is a(n)

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Which reason best explains why metals are malleable? a)because they have delocalized electrons b)because they have localized electrons c)because they have ionic bonds d)because they have rigid bonds