03/19/19

How long does it take for a blocked dopamine receptor to be broken down by the body?
Do the blocked dopamine receptors get broken down by the body and if so how often ? In other words how long does it take for the dopamine receptors blocked by irreversible dopamine antagonists to... more
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03/19/19

what mass of the AgCl precipitate should form?

When silver nitrate is added to an aqueous solution of magnesium chloride, a precipitation reaction occurs that produces silver chloride and magnesium nitrate. When enough AgNO3 is added so... more
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03/19/19

Determine the vapor pressure of a solution at 25°C that contains 85.3 g of naphthalene (C10H8) in 540 g of benzene (C6H6). The vapor pressure of benzene at 25°C is 74.6 torr.

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03/19/19

20.0 grams of ammonia are produced in the reaction between nitrogen and hydrogen. How many grams of each of the two gases were used up in this reaction?
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03/18/19

What is meant by mass transfer?
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03/18/19

How many grams of magnesium chloride can be produced from 2.30 moles of chlorine gas reacting with excess magnesium? Mg (s) + Cl₂ (g) → MgCI₂ (s)
A) 438 g B) 326 gC) 219 gD) 109 g
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03/18/19

Can hydrogen peroxide damage teeth?
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03/18/19

Can hydrogen peroxide damage teeth?
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03/18/19

How do the brain and nerves create electrical pulses?
The information between the brain and peripheral nerves is sent via electrical pulses or signals, How then does a non-metallic human cell manage to conduct an electrical signal?
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03/17/19

How and where, in the human brain, are memories stored?
Background: I am a computer programmer who is fascinated by artificial intelligence and artificial neural networks, and I am becoming more curious about how biological neural networks work. Context... more
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03/17/19

Chorine and fluorine react to form gaseous chlorine trifluoride. In an experiment, you started with 1.75 moles of chlorine and 8.68 moles of fluorine.

___Cl2 + ____F2 ---> ___ClF2a. What is the limiting reactant?b. What mass of chlorine triflouride can be made?c. Which reactant is in excess?d. What mass of the excess reactant remains unused?
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03/17/19

Copper (II) oxide solid and hydrogen gas react to form elemental copper and water.
a. Write a balanced equation for the reaction.b. How many grams of Cu can be produced when 19.9g of CuO react with 2.02g of H2?
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03/17/19

In an experiment, 0.400 mol Fe and 0.750 mol HCl are combined. How many moles of hydrogen will form?

____Fe + ____HCl ---> _____H2 + _____FeCl2
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03/17/19

1.11g of calcium chloride is added to water forming 500ml solution. 20ml of this solution is taken and diluted 10folds.Find moles of chloride ions in 2ml of diluted solution

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03/16/19

At a certain temperature the Kp for the decomposition of H2S is 0.709
At a certain temperature the Kp for the decomposition of H2S is 0.709H2S(g) (double arrows) H2(g)+S(g)Initially only H2S is present at a pressure of 0.186 atm in a closed container. What is the... more
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03/16/19

What is the mol fraction of propanol, C3H7OH, in a solution of 65.7g of propanol and 475g of water?
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03/16/19

What happens to the red blood cell in CaCl₂ solution?
Here's the problem:One red blood cell is placed in a hypertonic solution of NaCl, another isplaced in a solution of CaCl2 equimolar with the NaCl solution. Whatwould you expect to happen and why?My... more
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03/16/19

What is the difference between molecular geometry and electron geometry?
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03/16/19

What Role Antagonists Play in the Study of Drugs?
I am pretty unfamiliar to pharmacology. I'm doing a research on drug abuse, particularly opioids' mechanism of action. I encountered several times evidences that come from studies using... more
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03/16/19

Which is a possible example of species that can comprise a buffer solution?
CH3COOH and NaCH3COOCH3OH and CH3COOHHCl and NaOHH2O and NaOH
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03/16/19

What will be the pH of a solution containing an acid of pKa1.9, with an acid concentration twenty times that of the conjugate base?
What will be the pH of a solution containing an acid of pKa1.9, with an acid concentration twenty times that of the conjugate base?
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03/16/19

What is the pH of a 0.100 M solution of NaHCO3 at 25∘C, given that the Ka of H2CO3 is 4.3×10−7?
 What is the pH of a 0.100 M solution of NaHCO3 at 25∘C, given that the Ka of H2CO3 is 4.3×10−7?
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03/16/19

Why is atropine a CNS stimulant, although it blocks the muscarinic receptors in the brain?
I know that atropine is a muscarinic antagonist, so why does atropine have excitatory actions on the brain while it is blocking muscarinic receptors?
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03/16/19

Umbrella term for agonist, antagonist, inverse antagonist, etc.?
For most receptors there exist different ligands that induce different responses. Depending on the response these different ligands can be classified into different groups such as agonists,... more
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03/16/19

What is anything that has mass and takes up space?
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