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- PAP Chemistry-2903012-42100P-1/ Le Chatelier's Principle/ Lesson 128 2. Zinc (Zn) granules react slowly with dilute hydrochloric acid (HCI), but much faster if the acid is concentrated. Zn(s) 2HCI(aq)ZnCl2(aq) + H2(g) Zinc + Hydrochloric Acid Zinc Chloride + Hydrogen What causes the reaction to proceed faster with concentrated acid? The concentrated hydrochloric acid causes more hydrogen gas to be produced. The pressure of hydrogen gas molecules increases as concentration increases. The concentrated hydrochloric acid molecules move faster than in dilute acid. There are more collisions between the zinc and concentrated hydrochloric acid. PREVIOU3. (a) The optical rotation [a]20 of aqueous samples of pure a-D-glucose and 1 pure ß-D-glucose were measured over time and a graph plotted (below). The optical rotation of both samples tends towards the same value, +52.7, as time proceeds. Explain, with the use of a diagram, why this trend is observed. +112 [a] +52.7 +19 Timeb) What is the difference between the MGS and EGS? Explain what is the main role of Trichlorsilane processing. in EGS
- Explain why methicillin-resistant S. aureus (MRSA) is a problem in clinical medicine.82. The space shuttle Orbiter utilizes the oxidation of methylhy- drazine by dinitrogen tetroxide for propulsion: 4N₂H3CH3(1) + 5N₂O4 (1) 12H₂O(g) + 9N₂(g) + 4CO2(8) Calculate AH for this reaction. ▬▬▬▬▬▬▬▬▬▬Selective serotonin reuptake inhibitors (SSRIs) are commonly prescribed antidepressants. SSRIs block the reabsorption of the neurotransmitter serotonin in the brain. Changing the balance of serotonin helps brain cells send and receive chemical messages, which in turn boosts mood. Two SSRI medications are Faverin (fluvoxamine, C15H21F3N2O2 ) and Zoloft (sertraline, C17H17Cl2N ). Determine the molar masses of Faverin and Zoloft