Question: PART I. QUESTIONS Methane, CHa: Ethane, C2Ho: Butane: or Cyclic alkane 1. Compare the number of valence electrons used in the bonds in your structure w ith the expected number available on the component atoms. You should get perfect agreement, i.e., all the structures are entirely consistent with the Lewis structures of these molecules Total Valence

What is the empirical formula of a compound that consists of 39.99% carbon, 6.73% hydrogen, and 53.28% oxygen? - CHO - C2HO - CH2O - CHO2

Draw Lewis structures of the molecules C2Ho; CoHs; and CoH; and compare the following: The C-H bond angle The hybridization of the carbon atoms The numbers of sigma and pi bonds in the molecules n many molecules, the observed bond angles deviate from the geometrically-predicted bond angles. Give at least two examples of molecules in which this occurs, and explain why …

Question: Question 25 How many moles of C2Ho are present in a sample of C2H6 that contains 4.35 moles of H atoms? Question 26 How many moles of oxygen are in a sample of NaHS2O3 that contains 1.87 moles of S?

Question: A substance has a molar mass of 60 g/mol with 40.0 percent carbon, 6.7 percent hydrogen, and 53.3 percent oxygen. What is its empirical formula? 1. C3H3O2 2. CHO 3. C2H4O2 4. C2H2O3 5. CH2O 6. C2HO 7. C3H2O2 8. CHO2 9. C2H3O2

Decomposition of ethane, C2Ho (g), into its elements, carbon and hydrogen, requires 84.7 kJ per mole of ethane decomposed. Determine the number of hydrogen molecules produced if 2.85 kJ are required in a reaction.

Science Chemistry Chemistry questions and answers 28. A certain compound has a molar mass of 120 g/mol. Which is a possible empirical formula for this compound? a. C2H20 b. CHO c. C2H202 d. C2HO e. CH20 29. A 9.14-g sample of solid silver reacted in excess chlorine gas to give a 12.1-g sample of pure solid AgCL.

Question: 19.54 Calculate AS values for the following reactions by using tab- ulated S° values from Appendix C. In each case explain the sign of Δ S°. (a) HNO3 (g) + NH3 (g)-→ NH4NO3 (s) (b) 2 Fe2O3 (s)-→ 4 Fe (s) + 302 (g) (c) CaCO3 (s, calcite) + 2HCl (g)-- CaCl2 (s) + CO (8)+H,o (l) (d) 3 C2Ho (g) CoHo () 6 H2 (8)

Question: Question H2 (g) + C2H4 (g) -> C2Ho (g) BE (C-H)-413 kJ BE (H-H) 436 k] BE (C C) 614 kJ BE (C-C)-348 kJ What is the enthalpy of the reaction using bond energies? Your answer should have three significant figures Provide your answer below: kJ Show transcribed image text

Draw the Lewis dot diagram for a compound with the formula C2HO showing all electrons (both bonding and non-bonding). Draw a cartoon that shows the hybrid orbitals and unhybridized orbitals on each atom interacting with the orbitals of the other atoms it is bound to. (1 pt) 4.