How many grams of H2 are needed to completely react within 50g of N2?

Based on the equation and the information in the table, what is the enthalpy of the reaction?

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

Define dew point. i am writing this part to be able to ask the question