Organic chemistry:Difference between sn1 and SN2 reactions

And which reaction is nitrogen reduced

How do I (a) determine the energy change in the following reaction2 O2 + CH4→ CO2 + 2 H2Ogiven the following bond dissociation energies:C-C 340kJ/mol; C-H 420kJ/mol; O=O 490 kJ/mol; O-H 460 kJ/mol; C=O 720 kJ/mol. (b) Is the reaction exothermic or endothermic? Explaination?

Write a synthesis reaction for this mechanism:

The addition of NO accelerates the decomposition ofN2O, possibly by the following mechanism:NO(g) + N2O(g)--->N2(g) + NO2(g)2 NO2(g)--->2 NO(g) + O2(g)(a) What is the chemical equation for the overall reaction?Show how the two steps can be added to give theoverall equation. (b) Is NO serving as a catalyst or an intermediatein this reaction? (c) If experiments show thatduring the decomposition of N2O, NO2 does not accumulatein measurable quantities, does this rule out the proposedmechanism?

Consider the given reaction in which NC−NC− is the nucleophile and CH3CNCH3CN is the solvent. The reactant molecule has a structure with solid and dashed wedge bonds. A solid wedge () is used to show the bond that is above the plane of the paper, and a dashed wedge () is used to show the bond that is behind the plane of the paper. Draw the product of the following reaction:

Consider a chemical reaction between compound A and compound B. The reaction proceeds via a multi-step mechanism involving several intermediates and transition states. The overall reaction is exothermic, but one of the intermediate steps is endothermic. Explain how the endothermic intermediate step can still be consistent with the overall exothermic nature of the reaction.

Free Cl atoms are able to react with ozone in a catalytic cycle that converts O3 into the more stable O2. It is estimated that a single Cl atom is able to react with∼100000 O3molecules. Although CFCs production was banned in 1996, there are still a substantial numberof motor vehicle air conditioners (MVACs) that use CFC-12 (CF2Cl2) as refrigerant.The average CFC-12 emission rate from operating MVACs has been estimated to be 59.5 mg per hour per vehicle How much chlorine, in kg, is added to the atmosphere in a year due to 100 million MVACs using CFC-12 as refrigerant? would like an in depth explanation so I can solve future ones like this, thanks.

# moles of c2h2 that will burn in the presence of 1.43 mol o2?

Fill in the missing information for each of the 4 reactions