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Browse through our recently updated questions and discussion topics.
A concentration-time study of the gas phase reaction 2 A3 → 3 A2 produced the data in the table belo
A concentration-time study of the gas phase reaction 2 A3 → 3 A2 produced the data in the table belo
A concentration-time study of the gas phase reaction 2 A3 → 3 A2 produced the data in the table below.

   Time (s)   [A3] (M)   [A2] (M)
   0   4.00 × 10-4   0
   10   2.00 × 10-4   3.00 × 10-4
   20   1.00 × 10-4   4.50 × 10-4
   30   5.00 × 10-5   ?

What is the concentration of A2 after 30 seconds?
A) 5.00 × 10-4 M
B) 5.25 × 10-4 M
C) 5.50 × 10-4 M
12345
Chemistry   Whelan   3547   56   Michael Smith7   24 minutes ago
Mastering Astronomy, Seasons 2: Why is summer hotter than winter?
Mastering Astronomy, Seasons 2: Why is summer hotter than winter?
Hey everyone, I was hoping someone could help me with this question.

Each of the following figures shows a person (not to scale) located on Earth at either 40°N or 40°S latitude. Rank the figures based on how much time the person spends in daylight during each 24-hour period, from most to least. To rank items as equivalent, overlap them.
12...2425
Other   mpstorey   56505   339   Antonio Seales   4 hours ago
Adult with Stroke Hesi Case Study (Charles Daniel) - [Emergency]
Adult with Stroke Hesi Case Study (Charles Daniel) - [Emergency]
Course Title / Course Code: Adult with Stroke Hesi Case Study (Charles Daniel)

Textbook: Health Assessment

School: - - -

Price: trade

Extra Information: Adult with Stroke Hesi Case Study (Charles Daniel)
Answers
123
Test-Bank and Note Requests   Serenity113!   12107   33   BBB133   4 hours ago
A solution has a density of 1.023 g/mL and a concentration of 0.0800 g/dL. What is the concentration
A solution has a density of 1.023 g/mL and a concentration of 0.0800 g/dL. What is the concentration
A solution has a density of 1.023 g/mL and a concentration of 0.0800 g/dL. What is the concentration in parts per million?
A) 700 ppm
B) 1408 ppm
C) 550 ppm
D) 818 ppm
12
Chemistry   Whelan   1368   20   mf123   7 hours ago
Can you help me with my review? I've attached screenshots of the diagrams
Can you help me with my review? I've attached screenshots of the diagrams
** I tried to use photobucket to upload the pictures beside the questions however it didn't work. I instead had to attach them to this post

1. What are the most likely characteristics of the most recent common ancestor (MRCA) of fly species 1 and fly species 2, labeled in the diagram above?


Lots of leg bristles; can't tell on
12...89
General Biology   kryocron   17973   112   breezywonton   22 hours ago
A car service charges customers a flat fee per ride​ (which is higher during rush hour​ traffic) ...
A car service charges customers a flat fee per ride​ (which is higher during rush hour​ traffic) ...

A car service charges customers a flat fee per ride​ (which is higher during rush hour​ traffic) plus charges for each minute and each mile. Suppose​ that, in a certain metropolitan area during rush​ hour, the flat fee is $4, the cost per minute is $0.30 and the cost per mile is $1.30 Let x be the number of minutes and y the number of miles. At the end of a​ ride, the driver s
Mathematics   Catracho   424   3   Kat5   One day ago
How to select sunglass after Cataract Surgery?
How to select sunglass after Cataract Surgery?
Referring to following statement, I would like to know on how to select sunglass after Cataract Surgery,

100% UV protection is common for most of Sunglass, what transmittance should be selected?

Does anyone have any suggestions?
Thanks in advance


"First, you’ll want to make sure that the lenses of your pair of sunglasses that provide
News Articles and Discussion   oemBiology   35   One day ago
Which of the following characteristics does NOT pertain to management accounting? A. Has externally
Which of the following characteristics does NOT pertain to management accounting? A. Has externally
Which of the following characteristics does NOT pertain to management accounting?
 A. Has externally imposed standards
 B. Provides information and estimates about future activity
 C. Provides financial and operating data multidisciplinary in scope
 D. Generates specific-purpose financial statements and reports
Business   Asiamah   46   Anonymous    One day ago
If you expect an unfavourable response to your message, it is quite effective to state your conclusi
If you expect an unfavourable response to your message, it is quite effective to state your conclusi
If you expect an unfavourable response to your message, it is quite effective to state your conclusions and recommendations up front.
Business   manjit kaur2   60   bolbol   One day ago
It’s important to understand the appropriate amounts of both macronutrients and micronutrients to ...
It’s important to understand the appropriate amounts of both macronutrients and micronutrients to ...
It’s important to understand the appropriate amounts of both macronutrients and micronutrients to consume and how the DRI standards indicating those recommended amounts relate to each other. Review the accompanying graphs and label the fields accordingly.
Drag the appropriate labels to their respective targets.
View Available Hint(s)



An individual
12...1314
General Biology   Catracho   7573   190   Meiaj1120   One day ago
A 1.35 m aqueous solution of compound X had a boiling point of 101.4 °C. Which one of the following
A 1.35 m aqueous solution of compound X had a boiling point of 101.4 °C. Which one of the following
A 1.35 m aqueous solution of compound X had a boiling point of 101.4 °C. Which one of the following could be compound X? The boiling point elevation constant for water is 0.52 °C/m.
A) C6H12O6
B) CH3CH2OH
C) Na3PO4
D) CaCl2
E) KCl
12
Chemistry   chemDO   2614   24   dthoma40   One day ago
In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 Å ...
In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 Å ...
In the ionic compounds LiF, NaCl, KBr, and RbI, the measured cation–anion distances are 2.01 Å (Li–F), 2.82 Å (Na-Cl), 3.30 Å (K–Br), and 3.67 Å (Rb–I), respectively.

1. Predict the cation–anion distance using the values of ionic radii given in Figure 7.7, on page 257 in the textbook.
2. Calculate the difference between the experimentally measured ion–ion distances a
12345
Chemistry   sarah52309   3776   68   dani b   2 days ago
Epigenome in highly regenerative animals?
Epigenome in highly regenerative animals?
Do animals like zebrafish that are highly regenerative have a slower rate of epigenetic changes over time compared to humans?
News Articles and Discussion   CarbonRobot   58   bio_man   2 days ago
What level of barometric pressure effects body?
What level of barometric pressure effects body?
Referring to following statements, I would like to know on any article about what level of barometric pressure effects body as describe below

Does anyone have any suggestions?
Thanks in advance


High Barometric Pressure Effects on the Body
When the barometric pressure is high, more pressure is pushed against our body, limiting tissue expansion. T
News Articles and Discussion   oemBiology   180   11   Anonymous    2 days ago
Three debts, the first for $1720 due four months ago, the second for $1315 due in 5 months, and the ...
Three debts, the first for $1720 due four months ago, the second for $1315 due in 5 months, and the ...
Three debts, the first for $1720 due four months ago, the second for $1315 due in 5 months, and the third for $1640 due in 7 months, are to be paid by a single payment today. How much is the single payment if money is worth 7.5% p.a. and the agreed focal date is today?
Mathematics   Lada   722   6   Hiren Dolar   2 days ago
The primary purpose of the shoulder complex is to:
The primary purpose of the shoulder complex is to:
a. lift and push objects
b. assist with forced inspirations and expirations
c. place the hand in position for function
d. elevate the body
Kinesiology   Anonymous   51   bio_man   2 days ago
Writing is a two-step process.
Writing is a two-step process.
Writing is a two-step process.
False, it is 3 step process.
Business   manjit kaur2   52   bio_man   2 days ago
Philosophy of feminism
Philosophy of feminism
According to Mary Wollstonecraft how are obstacles faced by women similar to those faced by the rich?
Religion and Philosophy   quiten   56   Anonymous    2 days ago
Drag each word or phrase to the part of the Venn diagram to which it is associated; if a word or ...
Drag each word or phrase to the part of the Venn diagram to which it is associated; if a word or ...
Drag each word or phrase to the part of the Venn diagram to which it is associated; if a word or phrase is
associated with both muscular and skeletal systems, place it in the overlapping parts of the circles.

[img width=350 height=203]https://biology-forums.com/gallery/594357_31_10_16_1_56_
12345
Cell Biology   Devyobey   5540   63   Casamira Cunningham   2 days ago
How do bacteria regulate transcription of these operons? (Mastering Genetics)
How do bacteria regulate transcription of these operons? (Mastering Genetics)
The question is about regulation of model operons.
The trp and lac operons are regulated in various ways. How do bacteria regulate transcription of these operons?
Sort the statements into the appropriate bins depending on whether or not each operon would be transcribed under the stated conditions.
I am down to my last 2 attempts and can't seem to figure out whats
12
Genetics and Developmental Biology   KC53   35153   18   Khalid Ajumobi   3 days ago
Density gradient centrifugation?
Density gradient centrifugation?
Mastering Bio question:
The experimental technique: Density-gradient centrifugation

When a solution of cesium chloride (CsCl) is subjected to high-speed centrifugation, a stable density gradient is formed. Meselson and Stahl found that when cell contents were subjected to centrifugation with a CsCl solution, a band of DNA formed at the CsCl density that matched the d
12
General Biology   goldenanchor   18369   19   McKenzy Brown   3 days ago
A solution is 4.50% by weight NaHCO3. How many grams of NaHCO3 are in 450.0 g of solution?
A solution is 4.50% by weight NaHCO3. How many grams of NaHCO3 are in 450.0 g of solution?
A solution is 4.50% by weight NaHCO3. How many grams of NaHCO3 are in 450.0 g of solution?
A) 1.000 g
B) 20.2 g
C) 400 g
D) 450 g
12
Chemistry   Whelan   1472   18   Jay Patel12   3 days ago
Laboratory Manual for Principles of General Chemistry - [Emergency]
Laboratory Manual for Principles of General Chemistry - [Emergency]
Textbook Title: Laboratory Manual for Principles of General Chemistry

Author(s): Jo Allan Beran

Publisher: Wiley

Edition: 10th

Willing to Pay: 50

Extra Information: Thank you in
Test-Bank and Note Requests   kidfury   248   3   goodguys   4 days ago
AP Physics Potential Energy
AP Physics Potential Energy
3. Planet X-39 has a mass equal to 1/3 that of Earth and a radius equal to 1/3 that of Earth. If v is the escape speed for Earth, what is the escape speed for X-39?
Physics   Zainab Ansari   66   2   Anonymous    4 days ago
What makes the hollow part in a blastula?
What makes the hollow part in a blastula?
Hey guys.
I am trying to do a bit of a Google search around as to what actually forms the hollow part of a blastula.
My understanding is a morula is not hollow, and then something happens where it is hollow.
I feel like I've also read that the at this stage of development, the embryo is the same size of the zygote, so is there apoptosis, or something that leav
Cell Biology   Naithi O_Rea   56   3   bio_man   4 days ago
A motorcycle moving at 50 km/h skids 10 m with locked brakes. How far will it skid with locked ...
A motorcycle moving at 50 km/h skids 10 m with locked brakes. How far will it skid with locked ...
A motorcycle moving at 50 km/h skids 10 m with locked brakes. How far will it skid with locked brakes when traveling at 150 km/h?
A) 10 m
B) 30 m
C) 50 m
D) 90 m
Physics   teacherlovinz   139   2   Anonymous    4 days ago
A line in the spectrum of atomic mercury has a wavelength of 258 nm. When mercury emits a photon of ...
A line in the spectrum of atomic mercury has a wavelength of 258 nm. When mercury emits a photon of ...
[html]A line in the spectrum of atomic mercury has a wavelength of 258 nm. When mercury emits a photon of light at this wavelength, the frequency of this light is:


▸ 8.61 × 10
Chemistry   cmesser94   98   2   Anonymous    4 days ago
a solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution..
a solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution..
...which the [OH-] is 1.0 x 10^-2 M. Some Fe(OH)2 precipitates. The value of Ksp for Fe(OH)2 = 8.0 x10^-10.

A. Assuming that the hydroxide is 1.0 x 10^-2 M, calculate the concentration of Fe2+ ions in the solution.

B. A battery is prepared using the above solution with an iron wire dipping into it as one half-cell. The other half-cell is the standard nickel electrode. Write the ba
123
Chemistry   freddy0622   4102   31   Elisa Dzuong   4 days ago
Probability Distribution
Probability Distribution
Instructions:
a) Identify the type of probability distribution shown in the problem: binomial, hypergeometric, poisson etc.
b) Identify the given in the problem.
c) Solve for the probability.

Problem:
1) According to a poll released by a global polling firm, 80% of Canadians believes that the government is handling the Covid-19 crisis "well".
Statistics and Probability   RioNii   89   4   4 days ago
Probability Distribution
Probability Distribution
Instructions:
a) Identify the type of probability distribution shown in the problem: binomial, hypergeometric, poisson etc.
b) Identify the given in the problem.
c) Solve for the probability.

3) Suppose you are randomly guessing in a ten multiple choice questions. Find the probability that  you will get exactly five correct answers. Each question ha
Statistics and Probability   RioNii   78   3   Anonymous    4 days ago
Megan has asked Danny to come to her office to discuss the many comments she has been hearing about ...
Megan has asked Danny to come to her office to discuss the many comments she has been hearing about ...
Megan has asked Danny to come to her office to discuss the many comments she has been hearing about his inability to get along with his employees. What advice can Megan offer to Danny in terms of enhancing and refining his managerial skills in this area?
Business   candy7music   174   3   Kareem Jarvis   4 days ago
A 40.0-L container is divided into two equal parts by a rubber membrane. One hal
A 40.0-L container is divided into two equal parts by a rubber membrane. One hal
A 40.0-L container is divided into two equal parts by a rubber membrane. One half of the container has 1.80 moles of an ideal monatomic gas at 270 K, and the other half is a vacuum. The container does not allow any gas to escape but is free to exchange heat with the surroundings. The membrane breaks, the gas expands isothermally and eventually the gas reaches a new equilibrium condi
Chemistry   PPK   800   bolbol   4 days ago
An irreversible engine operating between the temperatures of 550 K and 300 K ext
An irreversible engine operating between the temperatures of 550 K and 300 K ext
An irreversible engine operating between the temperatures of 550 K and 300 K extracts 1200 J of heat from the hot reservoir and produces 450 J of work. How much entropy is created in the process?
A) 0.32 J/K
B) 0.68 J/K
C) 0.44 J/K
D) 0.73 J/K
E) 0 J/K
Chemistry   PPK   1145   bolbol   4 days ago
Please, help! Question from PhysioEx9, exercise 4
Please, help! Question from PhysioEx9, exercise 4
What are potential sources of variability when generating a glucose standard curve?

Please, need explanation because I did not understand this question.
Thanks.
Anatomy and Physiology   naydaolga   3965   bolbol   4 days ago
Which of the following is NOT a consequence of high cellular levels of cAMP?
Which of the following is NOT a consequence of high cellular levels of cAMP?
a) Activation of a kinase cascade
b) Activation of a G-protein
c) Activation of protein kinase A
d) Increased phosphorylation of a protein
e) Stimulation of phosphorylation-mediated activity.

doesn't GPCR activate cAMP?
General Biology   runner2392   692   bolbol   4 days ago
Cellular Respiration and Metabolism
Cellular Respiration and Metabolism
1. If a substance makes the lipid bilayer of the inner mitochondrial membrane highly permeable to H+ protons will that cause you to gain or lose weight and why.
2. If a substance increases the number of free hydrogen ions or protons in the intermembrane space of the mitochondria will that cause you to gain or lose weight and why.
3. If a substance partially blocks the pyru
General Biology   Melissa123   1250   bolbol   4 days ago
Describe the relationship between pressure and blood flow.
Describe the relationship between pressure and blood flow.
Describe the relationship between pressure and blood flow.
__The higher the pressue the faster blood will flow__

What kind of change in the cardiovascular system would
result in a pressure change?
   Retention of  water

Why would such a change cause problems?

Anatomy and Physiology   butterflies   1284   bolbol   4 days ago
Messner and Tardiff’s study using the routine activities approach found that ________.
Messner and Tardiff’s study using the routine activities approach found that ________.
Messner and Tardiff’s study using the routine activities approach found that ________.
a. peoples’ lifestyles affected their chances of being victimized
b. people victimized by people they knew tend to stay inside more often
c. people victimized by those whom they knew tend to go out more often
d. routine activities have no bearing in interpreting the social ecol
12
Legal Studies   Haileigh00   2883   19   Desiree Trevino   5 days ago
Probability Distribution
Probability Distribution
Instructions:
a) Identify the type of probability distribution shown in the problem: binomial, hypergeometric, poisson etc.
b) Identify the given in the problem.
c) Solve for the probability.

4) The length of time, L hours, that a phone will work before it needs charging is normally distributed with a mean of 100 hours and standard deviation of 15 hours.
Statistics and Probability   RioNii   51   Anonymous    5 days ago
Probability Distribution
Probability Distribution
Instructions:
a) Identify the type of probability distribution shown in the problem: binomial, hypergeometric, poisson etc.
b) Identify the given in the problem.
c) Solve for the probability.

2) The average number of relief goods your household receives during a pandemic is 3 per month. What is the probability that exactly 4 relief goods will be received
Statistics and Probability   RioNii   44   Anonymous    5 days ago
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