The complete combustion of ethanol, c2h50h (fw = 46.0 g/mol), proceeds as follows: c2h50h (l) + 3 02 (g) - --→ 2 c02 (g) + 3 h20 (l) llh = - 555 kj what is the enthalpy change for combustion of 4.0 moles of c2h50h?

Describe two ways that thermal energy transfer in earth changes the land

Which of the following is not a significant threat to the worlds' rainforest? a. grazzing b. logging c. agriculture d. shipping

How hard is Stoichiometry? Just want to know since I'm about to do a lesson on it ...

Can you make alcohol by putting abunch of cut up fruits in a bag for about 2 weeks?

Calculate the enthalpy of the reaction 2NO (g) + O2 (g) →2NO2 (g) given the following reactions and enthalpies of formation: 12N2 (g) + O2 (g) →NO2 (g), ΔfH∘A=33.2 kJ mol-1 12N2 (g) + 12O2 (g) →NO (g), ΔfH∘B=90.2 kJ mol-1

What does it mean when a mineral has a definite chemical composition? Select 2 choices. It always occurs in pure gorm. It always contains certain elements. It cannot form from living or once living materials.

During Trial 2, what allowed you to determine that aluminum was the limiting reactant? Check all that apply. All of the copper dissolved. The solution turned clear All of the aluminum dissolved.

49.7 mL of a solution of NaOH is needed to neutralize a solution that contains 1.86 g of H2504 in 20.00 mL of water. What is the molarity of the NaOH solution? H2SO4 + 2 NaOH - -> 2H2O + Na2SO4 1) 0.763 M 2) 0.0404 M 3) 1.13 M 4) 0.481 M 5) 0.

Which of the following is true about lonization? The ionic substances donate some of their atoms to the solvent. The covalent substance breaks apart into ions. The ionic substance breaks apart into ions.

Potassium iodide reacts with lead (II) nitrate in this precipitation reaction: 2 KI (aq) + Pb (NO3) 2 (aq) → 2 KNO3 (aq) + PbI2 (s) What minimum volume of 0.200 M potassium iodide solution is required to completely precipitate all of the lead in 155.