Formic acid, HCOOH, is a major component in ant bites. Calculate the mass, in grams of 3.14 x 1023 molecules of formic acid.
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23.97 grams.

Explanation:

First we convert 3.14 x 10²³ molecules into moles, using Avogadro's number:

Then we convert 0.521 moles of HCOOH into grams, using the molar mass of formic acid:

The answer is 23.97 grams.

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.