The risk of injury in a car accident is much greater if occupants do not wear a seat belt. Which of Newton's laws explains why this is true? * A) Law of inertia
B) Law of force and acceleration
C) Law of action-reaction
D) Law of gravity

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

tracks, burrows, eggshells, nests, tooth marks, or gastroliths