Non-metals form covalenrt chlorides because (a) they can give electrons to chlorine
(b) they can share electrons with chlorine
(c) they can give electrons to chlorine atom to form chloride ion
(d) they cannot share electrons with chlorine atom

b) they can share electrons with chlorine.

Explanation:

non metals required very high energy to gain or lose electrons, so they share electrons

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.