A pharmacist must calculate the shelf life for an antibiotic. The antibiotic is stored as a...
A pharmacist must calculate the shelf life for an antibiotic.
The antibiotic is stored as a solid and a fresh solution must be
prepared for the patient. The antibiotic is unstable in solution
and decomposes according to the following data:
| Time (days) | [Antibiotic] (mol/L) |
| 0 | 1.24 x 10-2 |
| 10. | 0.92 x 10-2 |
| 20. | 0.68 x 10-2 |
| 30. | 0.50 x 10-2 |
| 40. | 0.37 x 10-2 |
This is a first order process.
Question 1
Calculate the half-life for the antibiotic. The units should be in days and should be calculated to three significant figures.
23.1 days
| You are correct. Your receipt no. is 158-2860  |
Previous Tries |
Question 2
If you start with a 1.0 M solution, how long would it take for 37 % of the antibiotic to decompose?
The answer should be in days and should be calculated to three significant figures.
I'm stuck on question two.
Homework Answers
Add Answer to:
A pharmacist must calculate the shelf life for an antibiotic.
The antibiotic is stored as a...
A pharmacist must calculate the shelf life for an antibiotic. The antibiotic is stored as a...
A pharmacist must calculate the shelf life for an antibiotic. The antibiotic is stored as a solid and a fresh solution must be prepared for the patient. The antibiotic is unstable in solution and decomposes according to the following data: Time (days) [Antibiotic] (mol/L) 1.24 x 10-2 10. 0.92 x 10-2 0.68 x 10-2 30. 0.50 x 102 40. 0.37 x 10-2 This is a first order process. Question 1 Calculate the half-life for the antibiotic. The units should be...
Need help with these shelf-life calculations!! Step by step would be great! Thanks 1. The specific...
Need help with these shelf-life calculations!! Step by step would be great! Thanks 1. The specific decomposition rate k of an experimental drug obtained from Arrhenius plot is 3.4 x 10-4 hr-1 at room temperature. If the time required for 10% of a drug to degrade (t90%) represents a reasonable limit of degradation for the active ingredient and is designated as shelf-life, what will be the shelf-life in hours of this drug: 2. The shelf life of an API in...
A fossil was dated using rubidium-87, which undergoes beta decay and has a half-life of 4.75x1010...
A fossil was dated using rubidium-87, which undergoes beta decay and has a half-life of 4.75x1010 years. Calculate the age of the fossil if (5.7x10^1)% of rubidium-87 remains in the sample. Report your answer with 2 significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: X10 Answer units Question 2 (1 point) Thallium-201 is used to diagnose heart disease. The half-life of thallium-201 is 72.9 hours. If a patient takes 7.7 ug,...
10.0 см Ос В A 10.0 cm Point X (cm) y (cm) Potential (V) А. 12.0...
10.0 см Ос В A 10.0 cm Point X (cm) y (cm) Potential (V) А. 12.0 4.0 35.5 B 13.0 5.0 32.3 С 12.0 6.0 33.5 D 11.0 5.0 37.2 Using only the diagram and the data in the table, calculate an estimate of the x-component of the electric field (in N/C) at the purple star in the center of the four points. The sign (positive or negative) is important. (Your answer must be within 2% of the correct computed...
9. Calculate the standard deviation of the class count data. For full credit you must show...
9. Calculate the standard deviation of the class count data. For full credit you must show all of your work. The standard deviation should be no more than two significant figures. (15 pts) SD = . Sxa-)3 1-1 Write the meant standard deviation: L(2pts) Write the range of the standard deviation about the mean (3pts) 10. How precise were the counts? Explain using the standard deviation calculated. How does sample size contribute to a smaller standard deviation? (Spts) 11. Use...
please help me out with these questions, i need help. thank you in advance!! Question 2...
please help me out with these questions, i need help. thank
you in advance!!
Question 2 (2 points) The radioactive decay of an isotope was measured for 1 week. The kinetics were modeled using a first order integrated rate law plot, such that In[amount of radioactive isotope remaining] was plotted on the y-axis and time was plotted on the x-axis. The data set was modeling using a linear equation, y=-0.542-1.92. In blank # 1, determine the rate constant for the...
QuestiII Il poll ILS) Consider the data below: Time (minutes) Concentration (M) 1 0.05 2 0.042...
QuestiII Il poll ILS) Consider the data below: Time (minutes) Concentration (M) 1 0.05 2 0.042 3 0.034 4 0.028 5 0.018 Construct a concentration versus time plot with concentration on the y-axis and time on the x-axis. Then, determine the equation of the line that describes the data set. In blank # 1, report the slope of the line. Do not use scientific notation. In blank # 2, report the y-intercept of the line. Do not use scientific notation....
Johnny wished to create a 0.300 M NaCl solution. Johnny only had 50.0 mL of water,...
Johnny wished to create a 0.300 M NaCl solution. Johnny only had 50.0 mL of water, however. To create his goal solution, Johnny knew he needed to know the molar mass of NaCl, which was [Select ] Next, to find the the number of moles of Naci he needed, Johnny simply multiplied the [Select] by the volume of water, in liters, which was [Select) L. Then, he calculated the number of grams of NaCl he needed taking this number of...
Consider the reaction below: N2O4 (g) → 2 NO2 (g) Which of the following techniques be...
Consider the reaction below: N2O4 (g) → 2 NO2 (g) Which of the following techniques be used to determine the rate law is second order with respect to the concentration of dinitrogen tetroxide? O A graph of In([N204]) versus time will produce a straight line. A graph of [N204] versus time will produce a curved line. A graph of (N2O.) versus time will produce a straight line. The balanced chemical equation tells us that the reaction is first order with...
Below is a lab hand out for the questions. All my data for the questions are...
Below is a lab hand out for the questions. All my data for the questions are filled out below in BOLD LETTERING. All the questions I need answered are at the bottom with boxes where to put the answers. Background Alka-Seltzer� is an over-the-counter antacid and pain relief drug. The tablet contains aspirin (acetylsalicylic acid), citric acid, and sodium bicarbonate (NaHCO3). Sodium bicarbonate (NaHCO3) is responsible for the effervescent action of Alka-Seltzer. In this lab we will investigate the reaction...
A pharmacist must calculate the shelf life for an antibiotic. The antibiotic is stored as a solid and a fresh solution must be prepared for the patient. The antibiotic is unstable in solution and decomposes according to the following data: Time (days) [Antibiotic] (mol/L) 1.24 x 10-2 10. 0.92 x 10-2 0.68 x 10-2 30. 0.50 x 102 40. 0.37 x 10-2 This is a first order process. Question 1 Calculate the half-life for the antibiotic. The units should be...
A fossil was dated using rubidium-87, which undergoes beta decay and has a half-life of 4.75x1010 years. Calculate the age of the fossil if (5.7x10^1)% of rubidium-87 remains in the sample. Report your answer with 2 significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: X10 Answer units Question 2 (1 point) Thallium-201 is used to diagnose heart disease. The half-life of thallium-201 is 72.9 hours. If a patient takes 7.7 ug,...
10.0 см Ос В A 10.0 cm Point X (cm) y (cm) Potential (V) А. 12.0 4.0 35.5 B 13.0 5.0 32.3 С 12.0 6.0 33.5 D 11.0 5.0 37.2 Using only the diagram and the data in the table, calculate an estimate of the x-component of the electric field (in N/C) at the purple star in the center of the four points. The sign (positive or negative) is important. (Your answer must be within 2% of the correct computed...
9. Calculate the standard deviation of the class count data. For full credit you must show all of your work. The standard deviation should be no more than two significant figures. (15 pts) SD = . Sxa-)3 1-1 Write the meant standard deviation: L(2pts) Write the range of the standard deviation about the mean (3pts) 10. How precise were the counts? Explain using the standard deviation calculated. How does sample size contribute to a smaller standard deviation? (Spts) 11. Use...
please help me out with these questions, i need help. thank
you in advance!!
Question 2 (2 points) The radioactive decay of an isotope was measured for 1 week. The kinetics were modeled using a first order integrated rate law plot, such that In[amount of radioactive isotope remaining] was plotted on the y-axis and time was plotted on the x-axis. The data set was modeling using a linear equation, y=-0.542-1.92. In blank # 1, determine the rate constant for the...
QuestiII Il poll ILS) Consider the data below: Time (minutes) Concentration (M) 1 0.05 2 0.042 3 0.034 4 0.028 5 0.018 Construct a concentration versus time plot with concentration on the y-axis and time on the x-axis. Then, determine the equation of the line that describes the data set. In blank # 1, report the slope of the line. Do not use scientific notation. In blank # 2, report the y-intercept of the line. Do not use scientific notation....
Johnny wished to create a 0.300 M NaCl solution. Johnny only had 50.0 mL of water, however. To create his goal solution, Johnny knew he needed to know the molar mass of NaCl, which was [Select ] Next, to find the the number of moles of Naci he needed, Johnny simply multiplied the [Select] by the volume of water, in liters, which was [Select) L. Then, he calculated the number of grams of NaCl he needed taking this number of...
Consider the reaction below: N2O4 (g) → 2 NO2 (g) Which of the following techniques be used to determine the rate law is second order with respect to the concentration of dinitrogen tetroxide? O A graph of In([N204]) versus time will produce a straight line. A graph of [N204] versus time will produce a curved line. A graph of (N2O.) versus time will produce a straight line. The balanced chemical equation tells us that the reaction is first order with...
Most questions answered within 3 hours.
-
teo
pucks moving on a frictionless air table are about to collide. the
1.5 kg puck...
asked 2 minutes ago -
Problem #1
The area between Z = 0 and Z = 2.50
The area between Z...
asked 1 hour ago -
1. What is the meaning of the term communication style?
2. What are the benefits to...
asked 1 hour ago -
9.) You are buying a car that cost $26,500. You make payments of
$412 each month...
asked 1 hour ago -
. Suppose a discrete random variable has probability
distribution
P(x) = .2 if x = 0...
asked 2 hours ago -
Under the influence of its drive force, a snowmobile is moving
at a constant velocity along...
asked 3 hours ago -
Why do organizations decline? What steps can top
management take to halt, decline, and restore organizational...
asked 2 hours ago -
What mechanisms Drive speciation??
(I.e. what was Dawins theory on the orgin of species, and how...
asked 4 hours ago -
The manager at a car assembly plant believes that the mean
assembly time for a car...
asked 5 hours ago -
Which of the following is true of electron capture?
A) It decreases the nuclide's mass number...
asked 7 hours ago -
Assuming an efficiency of 43.10%, calculate the actual yield of
magnesium nitrate formed from 114.9 g...
asked 7 hours ago -
The highly pathogenic bacterium Clostridium
perfringens causes gangrene, a disease that results in the
destruction of...
asked 9 hours ago