Which set of coefficients will balance this chemical equation? HELP QUICKLY PLEASE __C2H4 + __O2 → 2CO2 + 2H2O

A. 1, 2

B. 1, 3

C. 2, 3

D. 2, 5

I will gladly give a BRAINLIEST for a CORRECT, EXPLAINED answer!!

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘

Adilute aqueous potassium nitrate solution is

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)