HW #3 F 2023

H20 -OH H30* (1) XS LIAIH4 (2) H2O HO, он (1) XS CH;MgBr (2) H20

Dr. X claims that she has found a new remedy (carrot extract) to cure acne. She scores an interview with the science writer for a local newspaper, and gets a brief article written about her and her claims in that newspaper. The article does not contain any experimental evidence, but mentions that Dr. X accidentally splashed some carrot extract on her face and found that the acne was reduced a few days later. Student Y finds the article and cites it as a source for a paper he is writing for class, as evidence that acne has been cured. (a) Is this finding a fact, a theory, a hypothesis, or an observation? Explain why you think so. (b) Was it OK for Student Y to use the newspaper article as evidence for his paper? Explain why or why not.

A population numbers 16,000 organisms initially and decreases by 8.9% each year.please type answer in words don't image upload thank you.

3. In patients with early stage lung cancer, stereotactic body radiation therapy (SBRT) has greatly improved survival in patients unable to undergo surgery. In tumors 100 Gy 10 BED have demonstrated significantly improved survival, when compared with doses <100 Gy 10. What is the BED of the following protocol? Would you suggest increasing the dose, or does it appear adequate, assuming the given information? What would you expect as the most likely side effect of therapy for this patient? 3 fractions of 15 Gy delivered every other day.

6. The growth rate of a certain bacteria is known to be proportional to the amount present. Five thousand strands of the bacteria were observed in the culture after 60 minutes; and after six hours, 15,000 strands. What was the number of strands the bacteria originally in the culture have? O A. Po = 4399 strands B. Po = 4013 strands O C. Po = 4436 strands O D. Po = 4356 strands

Directions: Read and internalize the short story below and answer the questions that follow. Complete solution is required. "The coronavirus disease (COVID-19) is an infectious disease caused by a new strain of coronavirus. This new virus and disease were unknown before the outbreak began in Wuhan, China, in December 2019. On 30 January 2020, the Philippine Department of Health reported the first case of COVID-19 in the country with a 38-year-old female Chinese national. On 7 March, the first local transmission of COVID-19 was confirmed. WHO is working closely with the Department of Health in responding to the COVID-19 outbreak." Aki and her family were alarmed with the news they watched and so first thing in the morning they rush to the nearest convenient store to secure disinfectant and sanitizers but unfortunately the store aiready had empty shelves of the essentials they needed. They went to other stores searching and to their dismay they acquired nothing. They were on their way…

A2 Answer which is the correct answer and give reasoning for the wrong answers. Which of the following is not a source of ROS in humans?A. SmogB. RadiationC. AgingD. Normal metabolismE. Hypoxia

Cuántos hidrógenos alfa tiene el siguiente compuesto? A 9 B 12 © C) 4 D 8 E 3 0

Read and internalize the short story below and answer the questions that follow. Complete solution is required. “The coronavirus disease (COVID-19) is an infectious disease caused by a new strain of coronavirus. This new virus and disease were unknown before the outbreak began in Wuhan, China, in December 2019. On 30 January 2020, the Philippine Department of Health reported the first case of COVID-19 in the country with a 38-year-old female Chinese national. On 7 March, the first local transmission of COVID-19 was confirmed. WHO is working closely with the Department of Health in responding to the COVID-19 outbreak.” Aki and her family were alarmed with the news they watched and so first thing in the morning they rush to the nearest convenient store to secure disinfectant and sanitizers but unfortunately the store already had empty shelves of the essentials they needed. They went to other stores searching and to their dismay they acquired nothing. They were on their…

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What is MRI? How does it work (5 sentences max)? And how much does it cost each time?

← S $24 CHEM 107-02 Exam 1: Ju 个 X A ALEKS - Julianna Graham - Lex + www-awu.aleks.com/alekscgi/x/Isl.exe/10_u-lgNslkr7j8P3JH-IQUHIQg6bJxmeSyVpHOEB1plef9xyC5Ca9Qld CzyNjpf1orelUZCXOUPfJMZe5q2zqwE61GUYCODhTCI-QS... ☆ Acids and Bases Identifying the major species in weak acid or weak base equilibria 0/3 The preparations of two aqueous solutions are described in the table below. For each solution, write the chemical formulas of the major species present at equilibrium. You can leave out water itself. Write the chemical formulas of the species that will act as acids in the 'acids' row, the formulas of the species that will act as bases in the 'bases' row, and the formulas of the species that will act as neither acids nor bases in the 'other' row. You will find it useful to keep in mind that NH3 is a weak base. Julianna acids: 0.4 mol of HNO3 is added to 1.0 L of a 0.8M NH3 bases: solution. ☐ other: ☐ 0.1 mol of NaOH is added to 1.0 L of a solution that is 0.3M in both NH3 and NH,C1. ☐…

Past paper question

lonization radiation usually affects molecules in human cells like: glucose water DNA lipids

Give a clear handwritten answer...

Complete the following reaction:   27Al13   +  α  →   30P15 P  + __[a]_____

SS C cm 1 GtG tC FCX in SH U njmpLGQQmzAe4FI77iAeY/edit#slide%-id.g112e600b836_0_44 个 Help Accessibility Last edit was 2 hours ago Arial 21 BIUA work Day 1- 18 What were some potential human errors that could have occurred when calculating the mass before and after the reaction? Add these to your drawing on page 60.

Glucose Analyze an alpha-glucose molecule. Sketch the molecule below and connect the text- box with the appropriate region within the molecule. The bonds are strong and highly energetic. These atoms within the sugar provide polarity (water solubility) to the molecule. This part(s) of the molecule provide(s) reactivity CHOH OH HO. OH H. OH 一エ

Assign R/S for carbon 13. I Attachments Но A. R B. S ОН 3 ОН IS 16 О 12 О II 10 ОН ||

very strong back drugs on the tumor sizes of mice. The doctor is searching for the correct combination of medications that will make the tumor shrink in size. The drugs he has at his disposal are drugs / B and C. His experiments are summarized below. Average rate of Exp. [A), in [B], in [C], in shrinkage M M M # |(mm/week) 0.0010 0.0020 0.0030 0.010 II 0.0010 0.0010 0.0020 0.0050 0.0030 0.0020 0.0015 0.090 0.0030 0.0020 0.0030 0.090 II IV What is the rate law for this system? %23

7) Most natural products that become drugs are used in their native form (i.e., without chemical modification) since they have been already perfected by Nature over millions of years of evolution (True or False).

A Water Quality Standard will be developed for radioactive isotope “Iron-55” which has physical (radioactive) and biological half-lives of 2.7 and 1.6 years, respectively. Through toxicological studies scientists decided “spleen” as the critical organ and the critical accumulation of Iron-55 in spleen has been determined to be 0.5 gram. Assuming radioactive exposure is only due to drinking water consumption and average life expectancy is 75 years. a) What should be the Maximum Concentration Level (MCL) as mg/L for Iron-55 in drinking water.  b) How long does it take to eliminate 95% of this radioactive isotope from human spleen after the person gives up on drinking water contaminated with Iron-55?

Do you think Ghana should produce her own vaccine for the coronavirus

If H (t) is the amount in (mg) of Heparin in a patient, at time t. The patient is being dosed at a rate of 4 mg/hour, and the Heparin is broken down with a half-life of 1.4 hours in the body. Which of the following is true? Hint: use the balance law: dH dt dH dt = dH dt dH - dt 4 — e-0.5t = 4t - 0.5H Net rate of change = rate in - rate out 4 - 0.5H = 4t e -0.5t

A bacteria culture initially contains 100 cells and grows at a rate proportional to its size. After an hour the population has increased to 350. (a) Find an expression for the number of bacteria after t hours. P(t) = (b) Find the number of bacteria after 2 hours. (Round your answer to the nearest whole number.) P(2)= Bacteria (c) Find the rate of growth after 2 hours. (Round your answer to the nearest whole number.) P'(2) = bacteria per hour (d) When will the population reach 10,000? (Round your answer to one decimal place.) Hr

Subparts 11-15

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