Alex rode his bike from school to home and measured the distance to be 400 meters. It only took him 10 minutes to get home. What is his average speed in meters per
minute?
O
40m/min
O
.0250m/min
.667m/min
O
240,000m/min

40 meters per minute

Explanation:

If the total length was 400 meters and it took him 10 minutes, divide 400 by 10 and boom there you go

40 m/min

Explanation: why? because I did that before and it was right so I am sure about the answer and all to do is to divide 400 meter and 10 minutes

which you will get 40

400:10 = 40

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.