For the following reaction, 6.07g of ethylene (C2 H4) are mixed with excess Hydrogen gas. The reaction yields 5.84g of Ethane (C2H6).

The  theoretical yield of reactions Consider the reaction 1CO(g) + O2 (g) --> 2CO2(g) if 9.420 g CO is mixed with 16.84g O2, CALCULATE THE THEORETICAL YIELD (g) of CO2 produced by the reaction.

Aspirin can be made in the laboratory by reacting acetic anhydride (C4H6O3C4H6O3) with salicylic acid (C7H6O3C7H6O3) to form aspirin (C9H8O4C9H8O4) and acetic acid (C2H4O2C2H4O2). The balanced equation isC4H6O3+C7H6O3→C9H8O4+C2H4O2C4H6O3+C7H6O3→C9H8O4+C2H4O2In a laboratory synthesis, a student begins with 3.10 mLmL of acetic anhydride (density=1.08gml−1density=1.08gml−1) and 1.23 gg of salicylic acid. Once the reaction is complete, the student collects 1.22 gg of aspirin.    Determine the percent yield of aspirin for the reaction. Express your answer using three significant figures.

Please help with these! a) A mixture of hydrocarbons contains 33.9% hexane (C6H14) 11.3% octane (C8H18) and 54.8% heptane (C7H16). The mixture is combusted in an excess of oxygen. What mass of CO2 is generated from the combustion of 11.0 kg of the mixture? b) A mixture of131.5 g of P and 135.9 g O2 reacts completely to form P4O6 and P4O10. Find the masses of P4O6 and P4O10 that are formed by the reaction.