Alex and his friends are studying for a geometry test and one of the main topics covered is parallel lines in a plane. They each write down what they think it means for two distinct lines in a plane to be parallel : a. Rachel writes, "two distinct lines are parallel when they are both perpendicular to a third line." b. Alex writes , " two distinct lines are parallel when they do not meet ." Briana writes , "two distinct lines are parallel when they have the same slope." Analyze each definition , indicating if it is mathematically correct and if it has any drawbacks.

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.

28528289 29823282 8298232 39858

i think its 5049.

i hope this !

1 is the answer to this problem