Identify whether each substance is an acid or base. Ba(OH)2 Choose... RbOH Choose... HNO2 Choose... HClO4 Choose... KOH

Ba(OH)2- base

RbOH - base

HClO4 - acid

HNO2 - acid

KOH - base

Explanation:

According to Arrhenius, an acid refers to any substance that produces hydrogen ion in solution as it's only positive ion. The substances classified as acids above all produce hydrogen ion in solution.

Similarly, bases are defined as substances that produce hydroxide ion in solution. All bases mentioned above produce hydroxide ions in solution.

Recall that metal hydroxides are always basic although some of them are amphoteric in nature.

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).