From the enthalpies of reaction H2(g)+F2(g)→2HF(g)ΔH=−537kJH2(g)+F2 (g)→2HF(g)ΔH=−537kJ C(s)+2F2(g)→CF4(g)ΔH=−680kJC(s)+2F2 (g)→CF4(g)ΔH=−680kJ 2C(s)+2H2(g)→C2H4(g)ΔH=+52.3kJ2C(s) +2H2(g)→C2H4(g)ΔH=+52.3kJ calculate ΔHΔH for the reaction of ethylene with F2:F2: C2H4(g)+6F2(g)→2CF4(g)+4HF(g)C2H4(g )+6F2(g)→2CF4(g)+4HF(g) Express your answer using four significant figures.

the answer is na (sodium)

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

the answer is a for sure mark brainliest i had got this right on usatestprep