Based on the given bond energies what is the enthalpy change for the chemical reaction

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

Used the balanced equation 2h2+ o2 - -> 2h2o. if you have 7.2 grams of o2 , how many grams of h2o can you produce ?

Asap! will give brainiest when a heat wave strikes a region causing more people to run air-conditioning units, electrical demand increases. what needs to be done to meet this increased demand? raising the control rodslowering the control rodsremoving the control rods