76 14. The DNA base thymine dissolves in water due to hydrogen bond- ing. Which of the following hydrogen bonds drawn between thy- mine and surrounding water molecules are valid? (LO 8.10) H H| H (IV) H H H (I)' (II) H H----:O: H H H H (III) H H (a) I and II (c) I, II, III (b) I, II, IV (d) III and IV

What will happen to the equilibrium, NaHCO3(s)Na2CO3(s) + CO2(g) + H2O(g);Ho = 136 kJ when: (a) the temperature is decreased(b) the volume of the container is increased (c) water vapor is removed(d) additional Na2CO3 is added(e) pressure of CO2 is increased

8:59 l LTE O AWhy are iron oxides in rocks evidence for prehistoric photosynthesis? (1 O Iron oxides form when oxygen, a product of photosynthesis, is in the atmosphere O Iron oxides form when cyanobacteria use carbon dioxide for photosynthesis. O Iron oxides form when carbon dioxide, a reactant of photosynthesis, is in the atmos O Iron oxides form when cyanobacteria produce oxygen via photosynthesis. O Type here to search esc

For a reaction with AH < 0, which of the following must be true? O The bonds broken are stronger than the bonds formed. O The bonds broken are weaker than the bonds formed. O All bonds are broken heterolytically. O All bonds are broken homolytically.

can you please answer question 9.73 and all of the sub problems And show all of the steps to the solution

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Caluclate change H for the reaction 4 NH3 (g) + 5 O2 (g) -> 4 NO (g) + 6 H2O (g).

(Q99) Consider the formation of sulfur dichloride gas from gaseous sulfur and chlorine gas: S8 (g) + 8 Cl2 (g) 8 SCI2 (g). If the equilibrium concentrations at a certain temperature are as follows, what is the value of the equilibrium concentration (KJ? (3 sf) S8 (g) = 0.356 M Cl2 (g) = 0.799 M SCI2 (g) = 0.851 M

Acetaldehyde (CH3CHO) is an important chemical both industrially and biologically.  For instance, it is a (somewhat toxic) intermediate in the body's metabolism of ethanol into acetic acid, and thus is possibly implicated in the "hungover" symptoms of someone who has had too much to drink the night before.  In aqueous solution, it establishes an equilibrium with a hydrated form, shown below. CH3CHO (aq)   +   H2O (l)   <-->  CH3CH(OH)2 (aq) You start with an aqueous sample, already at equilibrium, with the CH3CH(OH)2 (the hydrated form) at a concentration of 2.60 M.  You have no information about how much, if any, of the anhydrous form (CH3CHO) is initially in the flask.  If you add 2.0 M of CH3CHO to the reaction flask, and as the equilibrium is being restored the amount of CH3CH(OH)2 changes by 1.13 M, what is the final amount of CH3CHO?

गड्डेडेजग mo కం కా cooction the manymoles of copor (1) ulAde