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4 years ago

Explain how your brain and sensory organs get information from the outside world

1 answer:

4 0

Your brain has about 100 billion neurons, all of which are interneurons. Each of these neurons may receive up to 10,000 messages from other neurons and may send messages to about 1,000 more. Every day, billions of nerve impulses travel through your nervous system from neuron to other neurons or body structures. The place where a neuron transfers an impulse to another structure is called a synapse. At the axon tips, electrical signals carried through the neuron change into a chemical form. This change allows the message to cross the gap. The message then continues in electrical from through the next neuron.

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If NaOH is added to 0.010 M Al3+, which will be the predominant species at equilibrium: Al(OH)3 or Al(OH)- 4 ? The pH of the sol

fredd [130]

Answer:

Al(OH)- 4,

Explanation:

NaOH added to 0.010 M Al3+

The predominant species at equilibrium will be = Al(OH)- 4, and this because sodium hydroxide ( NaOH ) is a base will readily form a stable complex ion with aluminum ion like ( Al( OH ) - 4 . also the higher the Kf value the more stable the complex ion becomes and the more soluble Al(OH)3 becomes

hence the predominant species at equilibrium is : Al(OH)- 4,

5 0

3 years ago

Consider a 125 mL buffer solution at 25°C that contains 0.500 mol of hypochlorous acid (HOCl) and 0.500 mol of sodium hypochlori

Helga [31]

Answer:

pH = 6.82

Explanation:

To solve this problem we can use the Henderson-Hasselbach equation:

pH = pKa + log $\frac{[NaOCl]}{[HOCl]}$

We're given all the required data to calculate the original pH of the buffer before 0.341 mol of HCl are added:

pKa = -log(Ka) = -log(2.9x10⁻⁸) = 7.54

[HOCl] = [NaOCl] = 0.500 mol / 0.125 L = 4 M

pH = 7.54 + log $\frac{4}{4}$

pH = 7.54

By adding HCl, we simultaneously increase the number of HOCl and decrease NaOCl:

pH = 7.54 + log $\frac{[NaOCl-HCl]}{[HOCl+HCl]}$

pH = 7.54 + log $\frac{(0.500mol-0.341mol)/0.125L}{(0.500mol+0.341mol)/0.125L}$

pH = 6.82

6 0

3 years ago

In certain types of atomic bombs, a fuel, like plutonium-239, is bombarded with neutrons to create an uncontrolled nuclear react

Juliette [100K]

I know that neutrons start nuclear rxns similar to this like Uranium-238. So I am going to say true.

6 0

3 years ago

Read 2 more answers

When heated, calcium carbonate decomposes according to the equation given below:

Ahat [919]

Answer:

15.2L at STP

Explanation:

Given reaction expression;

CaCO₃ → CaO + CO₂

Number of moles of CaCO₃ = 0.68mol

Unknown:

Volume of CO₂ produced at STP = ?

Solution:

To solve this problem, we must first find the number of moles CO₂ produced,

1 mole of CaCO₃ will produce 1 mole of CO₂

0.68mole of CaCO₃ will produce 0.68mole of CO₂ at STP

Now;

1 mole of gas occupies a volume of 22.4L at STP;

0.68mole of CO₂ will then occupy 0.68 x 22.4 = 15.2L at STP

8 0

3 years ago

CO2−3 Draw the molecule by placing atoms on the canvas and connecting them with bonds. Include all lone pairs of electrons. C C

ivolga24 [154]

Carbon dioxide (CO₂) it is a molecule with liniar geometry in which the carbon atom is bonded to oxygen atoms by double bonds. Each oxygen will have two lone pairs a electrons that are not involved in the chemical bonds.

Chemical diagram with the lone pairs represented, is found in the attached picture.

4 0

3 years ago