The coefficients in a balanced chemical equation always can express the ratio of a. moles of reactants and products. b. volume of reactants and products. c. atoms of reactants and products. d. mass of reactants and products.

New york city has 2,181 inhabitants per square mile. the state of alaska has 1.03 inhabitants per square mile. ecologists would say alaska has a low exponential growth population density birth rate carrying capacity

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above