Answer:
14.8% of H2O2
Explanation:
Based on the redox reaction of H2O2/MnO4- is:
2MnO4- + 5H2O2 + 6H+ ⇄ 2Mn2+ + 5O2 + 8H2O
<em>2 moles of KMnO4 react with 5 moles of H2O2</em>
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To solve this question we need to find the moles of KMnO4 until reach the endpoint. Using the balanced reaction, we can find the moles of H2O2 that must be converted to grams using its molar mass -Molar mass H2O2: 34.015g/mol-:
<em>Moles KMnO4:</em>
0.0297L * (1.4686eq/L) = 0.04362eq MnO4- * (1mol / 5eq) = 0.008723 moles MnO4-
<em>Moles H2O2:</em>
0.008723 moles MnO4- * (5mol H2O2 / 2mol MnO4-) = 0.02181 moles H2O2
<em>Mass H2O2:</em>
0.02181 moles H2O2 * (34.015g/mol) = 0.7418g H2O2
<em>%:</em>
0.7418g H2O2 / 5.0mL * 100
<h3>14.8% of H2O2</h3>
Answer:
The plateau phase seen during the action potential of a cardiac muscle cell is due to e. opening of calcium fast channels.
Explanation:
During cardiac contraction, myocardic cells reach a phase called phase 2 in which thanks to the umbral valor that they reach on the previous phase 1, calcium fast channels that are voltage dependent are open. Those fast channels just stay open by a few decimals of seconds. When those channels of calcium are open, a lot of calcium ions get into the cell maintaining depolarization of the myocardic cells. All positive charge that posses the cell due to the previous situation, causes efflux of potassium(an ion which have also a positive charge) like a way to reach a physiologic balance.
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Answer:
An occupational therapist.
Explanation:
An occupational therapist is a professional that helps a person with an illness, injuries, or disabilities to have a better quality of life and to prevent any further problems. The professional, together with the patient and the patient's family, set the goals. Then the occupational therapists design a plan to help the person to achieve the settled goals and helps the patient through the process. Throughout the process, the occupational therapist makes constant evaluations to check on the progress and see if any changes in the plan are needed.
