In looking at the bolded atoms in the answer choices, which pair consists of molecules having the same geometry? hints in looking at the atoms in the answer choices, which pair consists of molecules having the same geometry? ch2o and ch3oh co2 and so2 ch2ccl2 and ch2ch2 pcl3 and bf3

               1,1-Dichloroethene (CH₂CCl₂) and Ethene (H₂CCH₂) have same molecular geometries.

Explanation:

                      The molecular geometries of all molecules are drawn below. Among these molecules four molecules contains four atoms which has same geometry. These are Boron in BF₃, Carbon in CH₂O, both carbon atoms CH₂CCl₂ and both carbon atoms H₂CCH₂. All specified elements in these molecules have same geometry (Trigonal Planar). 

While, the overall geometry of only two molecules is same. Those two are CH₂CCl₂ and H₂CCH₂ because in these molecules all carbon atoms have Trigonal Planar Geometry. Hence, we can confirm that among given compounds this pair has same geometry.

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.

tracks, burrows, eggshells, nests, tooth marks, or gastroliths