05/23/19

How can you take the color out of polyester or dye it white?
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05/22/19

What is the best way to get healthy?
I am a 40 year old human male, I am five feet ten inches tall and weigh 220 pounds, I live a sedentary life style and eat an unhealthy diet.What is the best way to turn my life around and get... more
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05/22/19

Explain why similar yields of ammonia are produced at low-pressure levels, despite temperature increase.
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05/22/19

Why Does Salt Water Help Sore Throats?
I am having some trouble understanding how salt water, a simple solution, could so effectively remove the pains of a sore throat. I do believe that the answer is closely related to hypo/hyper-tonic... more
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05/21/19

What is the difference between organelle membranes?
Cells and organelles are contained in [lipid bilayers](http://en.wikibooks.org/wiki/Structural_Biochemistry/Lipids/Lipid_Bilayer). I'm particularly interested in eukaryotic organelle bilayers and... more
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05/21/19

Chemistry problems

1.Suppose you have 200.0 ml of o.2 M NaOH solution. If you dilute this to 500.0 ml of with water, what is the new molarity? 2 . Given 240 ml of 0.5M NaNO3 solution, to what volume do you need to... more
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05/21/19

From where does the oxygen in glucose come in photosynthesis?
Is it carbon dioxide or water? I'm talking about the oxygen present in glucose and not the oxygen that is released after photolysis of water.
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05/21/19

Does DNA react in all of the ways most other acids do?
As I understand it from my basic chemistry, there are some fundamental reactions that exist between any acid and other substances for example acid-base reactions that form a salt, and the existence... more
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05/20/19

Chemistry review

How many moles of air are in a 0.125L flask of the pressure is 1.0 atm and the temperature is 273K
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05/20/19

19.4 mL of 0.75M hydrochloric acid is used to titrate 24.3mL of sodium hydroxide. Write the balanced equation. What is the molarity of sodium hydroxide? Find the pH of sodium hydroxide.
Identify the acid and the base in the reaction
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05/20/19

The solubility of AgCl is 8 grams / kg of water. What is this concentration in ppm ?
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05/20/19

Can an adult without genetic lactase persistence still develop a tolerance for dairy foods?
While investigating the rise of adult lactose tolerance, I came across the news that China has been encouraging its citizens to drink more milk, even though most of the Asian population lacks the... more
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05/19/19

Please provide answer and if possible explanation
In the decomposition of ammonia on a platinum surface at 856 oC, 2NH3(g) → N2(g) + 3H2(g), changing the concentration of NH3 has no effect on the rate. Which unit below is the correct unit for the... more
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05/15/19

Which of the following results is an example of phototropism?
For a science experiment, Matt places a flashlight on the table on the east side of a potted plant. He covers the plant and flashlight with a darkened box. Matt waits several days, then checks to... more
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05/15/19

Domains in cell membrane?
How is movement of proteins and lipids between different domains of cell membrane prevented?Why is the noncytosolic layer not able to do lateral movements between domains but cytosolic layer is... more
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05/15/19

Aqueous sodium bisulfite gives off sulfur dioxide gas when heated, needed is moles and grams of different chemicals?
Aqueous sodium bisulfite gives off sulfur dioxide gas when heated:2NaHSO3(aq) → Na2SO3(aq) + H2O(ℓ) + SO2(g)If 567 mL of a 1.005 M NaHSO3 solution were heated until all the NaHSO3 had reacted, what... more
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05/14/19

a food chain is made up with peach tree an insect a mouse and a rock on which organism is the producer
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05/13/19

Synthesis of Fatty Acids Longer than 16 Carbons?
I understand that the human body when performing Fatty Acid Synthesis can synthesize only until C16 (palmitate). However the ER has desaturases and elongases. I know that desaturases are used to... more
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05/13/19

Simple diffusion of lipid-soluble molecules through phospholipid bilayer -- does anything get "stuck" in transit?
It's a pretty elementary concept, and when I first learned of it I don't think I had the foundations to even think of such a question, but I found myself the other day thinking about the... more
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05/12/19

Cells and Cell Structure

Permeability is the condition of being capable of materials flow into and out of a membrane. The permeability of a cell membrane is determined by how easily a molecule can diffuse across the... more
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05/12/19

What is the equilibrium equation for the dissociation of methanoic acid?
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05/12/19

What is a data sufficiency question?
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R

05/11/19

Filtering a data frame by values in a column?
I am working with the dataset `LearnBayes`. For those that want to see the actual data: install.packages('LearnBayes')I am trying to filter out rows based on the value in the columns. For... more
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05/11/19

Why is thymine not incorporated into mRNA?
I am aware that in transcription uracil bonds to adenine and not thymine. But what is it that actually prevents thymine from bonding to adenine in transcription, that is not present in replication?
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05/11/19

Are psychologists more immune to psychological problems?
Does knowledge of a psychological problem prevent (or enable one to better defend) the development of psychological issues? For example, if a person has studied about depression and is familiar... more
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