H2 is produced by the reaction of 118.5 ml of a 0.8775 M solution of H3PO4 according to the following equation: 2Cr + 2H3PO4 -> 3H2 + 2C-PO4

(a) Outline the steps necessary to determine the number of moles and the mass of H2 produced.
(b) Perform the calculations outlined.

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.

i'm pretty sure its b i might be wrong though!

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.