A mixture of 80.0 g of Cr2O3 and 8.00 g of C is used to produce elemental Cr by the reaction
Cr2O3 + 3C
2 Cr + 3 CO
a) What is the theoretical yield of Cr that can be obtained from the reaction mixture?
Cr2O3 (aq) + 3 C (s) - 2 Cr (s) + 3 CO (g)
b)which reactant is excess and how many grams are left over ?

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'