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Vanessa Ojeda

Vanessa O.

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INSTANT ANSWER

Name: Discussion Questions: Part A The following auectiane ralato to tha 2 . 3. For the reactions from 3 to 2 to 1 , does the \( \alpha \) -amino acid behave as an acid or a base? Justify your answer. 4. What is the "isoelectric point", and does the isoelectric point influence whether a general \( \alpha \). amino acid adopts structure 1,2, or 3 ? Explain your answer. 5. What is responsible for the observations made during this experiment on the egg-whites?

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ANSWER IN PROGRESS

Name: Discussion Questions: Part A The following questions relate to the 3 structures ?epresenting a general \( \alpha \) -amino acjid at different \( \mathrm{pH} \) conditions (above): 1. In a solution at low \( \mathrm{pH} \), which structure \( (1,2 \), or 3 ) would be adopted by a general \( \alpha \) -amino acid? Justify your answer. 2. For the reaction from 1 to 2 , does the \( \alpha \) -amino acid behave as an acid or a base? Justify your answer.

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Name: The following questions relate to the above structure: 3. What structure is represented? 4. What is the identity of each colored component?

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INSTANT ANSWER

Name: 5. What kinds of bonding are present? 6. What kinds of bonding are possible? 7. Rank the kinds of bonding given in your answer to question 4 above in order from strongest to weakest.

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ANSWERED

For the balanced chemical reaction 4Al + 3O2 ? 2Al2O3 complete the statement to properly convert from moles of oxygen to moles of aluminum oxide. Use numbers as answers. The conversion factor has moles of aluminum oxide in the numerator and moles of oxygen in the denominator.

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ANSWERED

For the balanced chemical reaction C5H12 + 8O2 ? 5CO2 + 6H2O Complete the statement indicating how to write a conversion factor converting moles of oxygen to moles of water. Use numbers as answers. The conversion factor has moles of water in the numerator and moles of oxygen in the denominator.

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ANSWERED

How many grams are in 0.743 mol of Al? Express your answer to three significant figures.

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ANSWERED

Write the balanced chemical reaction, including phase labels, for this reaction: "solid sodium bicarbonate decomposes into solid sodium carbonate, gaseous carbon dioxide, and liquid water."

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ANSWERED

Write the balanced chemical reaction, including phase labels, for this reaction: "solid potassium chlorate reacts to form solid potassium chloride and gaseous oxygen."

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INSTANT ANSWER

-Obtain the masses, separately, of (2) 50 mL beakers. -Add between 0.75 and 1.00 g of the copper(II) chloride hydrate salt to each beaker. -Add enough 6M HCl to dissolve the solid. Each sample will require between 5-10 mL of acid. Do not add more than 10 mL of HCl to each beaker. Be sure to continually swirl the mixture. -Perform a mass-to-mass conversion and calculate how many grams of magnesium metal are required to react. Your instructor will guide you. -Multiply step 4 by 1.5. Obtain this new amount of magnesium twice. Do not combine the two batches. -Slowly add one batch of magnesium to one of the beakers containing your mixture. Repeat with the second mixture. -If there is any magnesium in the mixture that has not reacted, add an additional 1-2 mL of HCl. -When the reaction is done, decant (pour off) the liquid into a separate waste beaker. - Add 5 mL of deionized water to the copper residue, swirl, and decant into the waste beaker. - Dry the copper metal by placing its beaker on a hot plate. Data: trial 1 & trial 2 -Mass of 50 mL beaker -Mass of copper salt -Stoichiometric mass of Mg -1.5 x stoichiometric mass of Mg -Mass of beaker containing dried copper residue

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