PLEASE HELP ME IM TAKING A BIG TEST A train travels 150 miles in 3 hours. At this same rate, how many miles will it travel in 8 hours?
0 400 miles
O 450 miles
O 500 miles
0 350 miles

400 miles because it is going 50 mph

400 miles because it is going 50 mph

Explanation:

I HOPE THIS HELPS.

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.