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nevsk [136]
3 years ago
11

Voltage-gated na+ channels are sensitive to changes in the extracellular concentration of what?

Chemistry
1 answer:
Shkiper50 [21]3 years ago
8 0
<span>They are sensitive to the concentration of calcium ions. These ions, at particular concentrations, will cause the channels to open up on the surface of the cell and allow them to flow through, changing the concentration gradient between the inside and outside of the cell.</span>
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An ice freezer behind a restaurant has a freon leak, releasing 41.60 g of C2H2F3Cl into the air every week. If the leak is not f
zlopas [31]
Weeks = 6 x 4 = 24
Mass leak rate of freon = 41.60 g/week
Mass leak rate of fluorine
Fluorine mass in Freon
= —————————————- X leak rate
M.M. Of Freon

19 x 3
——— X 41.60 = 20.010 gm/week
118.5

Total leaked in 6 months

= 24 x 20.010 = 480.24 gm = 0.480 Kg
5 0
3 years ago
The volume of a sample of a gas is 1.0 liter at STP. If the pressure remains constant and the temperature is raised to 546 K, th
kvasek [131]

Answer:

2 L is the new volume

Explanation:

We can apply the Ideal Gases Law to solve the problem.

At STP, we kwow that 1 mol of gas occupy a volume of 22.4 L

Then, how many moles do we have in 1 L?

Let's do it by a rule of three:

(1L . 1 mol) / 22.4L = 0.0446 moles

These moles are at 1 atm and 273 K of temperature, so let's change our conditions.

P . V = n . R .T

1 atm . V = 0.0446 mol . 0.082 L.atm/mol K . 546 K

V = 2 L

If we pay attention, we can notice that, if we double temperature, we double the volume.

6 0
3 years ago
Which substance will evaporate first???????????????????
torisob [31]

Answer:

I think it would be a liquid.

Explanation:

If the temperature hits a certain point, it will turn to ice. If the ice gets exposed to heat, it will melt and return back to it's natural form, a lqiuid. If the liquid is exposed to enough heat, it will evaporate. Not sure if this is right, but I tried my best!  

3 0
3 years ago
Which formula represents an electrolyte?<br> (1) CH3OCH3 (3) CH3COOH<br> (2) CH3OH (4) C2H5CHO
wlad13 [49]
(3) CH3COOH is the correct answer.

CH3COOH is a weak electrolyte. When being put in water, it separates into CH3COO- and H+, then the ions combine to form again CH3COOH. The process takes place back and forth.

Hope this would help~
3 0
4 years ago
Read 2 more answers
Enter the balanced NET IONIC equation for the potentially unbalanced equation AgNO3(aq)+NaCl(aq)→AgCl(s)+NaNO3(aq).
Zigmanuir [339]

Answer:

Ag^+(aq)+Cl^-(aq)\rightarrow AgCl(s)

Explanation:

Hello!

In this case, since the net ionic equations are ionic representations of the molecular equation in which the spectator ions (those at both reactants and products sides) are cancelled out, we first write the complete ionic equation for this reaction, considering that the solid silver chloride is not ionized due to its precipitation:

Ag^+(aq)+NO_3^-(aq)+Na^+(aq)+Cl^-(aq)\rightarrow AgCl(s)+Na^+(aq)+NO_3^-(aq)

Whereas the nitrate and sodium ions are cancelled out for the aforementioned reason as they are the spectator ions, to obtain:

Ag^+(aq)+Cl^-(aq)\rightarrow AgCl(s)

Which is the required net ionic equation.

Best regards!

4 0
3 years ago
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