The elements of which group are nonreactive? halogens alkaline earth metals noble gases alkali metals

The piezoelectric effect, when generating ultrasound waves, involves the conversion of: A. chemical energy to mechanical energy. B. electrical energy to potential energy. C. kinetic energy to electrical energy. D.

When a single celled organism copies its own DNA and splits into two new daughter organisms it is called binary fission external reproduction fragmentation regeneration

an atom has a charge of - 3 in its orbitals which statement must be true in order for this atom to have no net charge

How many grams of sodium nitrate will dissolve in 50 g of water at 20 degrees Celsius?

What happens to water during evaporation? A) It turns gas as it cools. B) It turns to liquid as it cools. C) It turns to solid as temperature decreases. Eliminate D) It turns to gas as the temperature increases.

A 2.00 L sample of gas at 35 C is to be heated at constant pressure until it reaches a volume of 5.25 L. To what Kelvin temperature must this sample be heated?

Of the following reactions, which one produces oxygen gas? Fermentation Anaerobic respiration Aerobic respiration Photosynthesis

Describe the electrodes in this iron-copper galvanic cell.

What happens to wood when it burns?

El cuerpo humano tiene unos 6 billones de células (6,0x1012) y la población de la Tierra es de unos 8 000 millones de personas. Con estos datos aproximados, calcula las moles de células humanas que hay en la Tierra.