*science* a planet is orbiting a nearby star. suppose that the star’s gravity increases over time. what effect will this increase most likely have on the planet’s path of motion? a. the planet will continue to move in an elliptical orbit around the star. b. the planet will begin to orbit the star at a constant speed. c. the shape of the planet’s orbit will change from elliptical to circular. d. the planet’s orbital path will become smaller and its orbital period will increase. e. the planet will begin to orbit the star in the opposite direction.

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023 

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.