Which of these represents an accurate mass description for the following reaction? 2H2 + O2 → 2H2O

Answer choices:
mass before reaction = 36 amu; after reaction = 36 amu
MBR = 12 MAR = 36
MBR = 18 MAR = 36
MBR = 36 MAR = 18

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

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

What does a complete balanced chemical equation include? a. exothermic coefficients b. endothermic coefficients c. valence electrons d. molar coefficients