3.50 g of an unknown base is dissolved in 289 ml of water and has a concentration of 0.219 m. what is the the identification of the unknown base.

The unknown base should be KOH whose molar mass is 56 g per mol (Answer)

Explanation:

Molarity = moles /(Volume in liters)  

So,  

Moles = Molarity Volume

Molar mass = mass/moles

The unknown base should be KOH whose molar mass is 56 g per mol (Answer)

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.