How many milliliters of concentrated nitric acid, hno3, 70 % (wt/wt) are required to prepare 1 liter of 0.250 m solution? the molar mass and density of hno3 are 63.0 g/mol and 1.36 g/cm respectively.

i'm not sure

explanation:

i'll try whatever you got

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.