Please answer all parts.  1. Consider the balanced reaction of sodium with bromine gas to form sodium bromide.  2Na (s) + Br2 (g) --> 2NaBr (s) a. If you start with 2.5 moles of sodium and 1.5 moles of bromine, which is the limiting reactant? Show calculations please. b. If you start with 50.0 grams of sodium and 50.0 grams of bromine, calculate the limiting and excess reactant. Show calculations pelase.

the reaction of 15 moles of carbon with 30 moles of oxygen will result in a theoretical yield of ____ moles of CO2 is what?

ABS plastic is a polymer consisting of three monomer units: acrylonitrile (C₃H₃N), butadiene (C₄H₆), and styrene (C₈H₈). A sample of ABS plastic contains 11.9% N by mass. It took 1.56 g of Br₂ to react completely with a 2.00 g sample of ABS plastic. Bromine reacts 1:1 (by moles) with the butadiene units in the polymer and nothing else, so bromination is a method for determining the quantity of butadiene in the polymer. What is the percent by mass of styrene in the polymer?

A small fire breaks out at the accident scene. You notice that the source is a compound with the formula CgH6. You also know that the combustion reaction requires O2 and produced carbon dioxide and water. Choose the correctly balanced reaction for CgH6. C8H6+1908CO₂ + 3H₂O 2C8H6+ 1902 16CO2 + 6H₂O C8H6+19/2 02 → 8CO2 + 3H₂O C8H6+902 8CO₂ + 3H₂O