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In the multiplication of exponential expressions, only exponents are added given that the expressions share the same base. If this is not the case, the expression remains the same or can be simplified. He...

A hydrogen bond requires both a lone pair of electrons on a O, N or F atom and a hydrogen atom. In water there are two lone pairs and two hydrogen atoms, allowing the formation of two hydrogen bonds. In a...

An overuse of antibiotics means the non-resistant strains are killed, leaving less competition for the resistant-strains of bacteria, so they can mutate to reproduce more resistant strains of bacteria.

First we label the two equations as (1) and (2):2x - 3y = 16 (1)x + 2y = -6 (2)We want both equations to have the same number before one of the variables so the easiest way is to multiply equation (2) by ...

Kidney filters blood via ultrafiltration filters small particles of blood out such as sugar salts water and urea. Large particle such are red blood cells and white blood cells stay in blood. Filtrate move...