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3 years ago

Which non metallic element is an essential constituent of nervous and muscular tissue?

Chemistry

1 answer:

Step2247 [10]3 years ago

5 0

Answer:

Phosphorus

Explanation:

The nonmetallic element, phosphorus, can be found in the tissues of the muscles, bones and nerves, and in the chemical adenosine triphosphate which is the major source of energy for the cells of the body.

Phosphorus is mainly concentrated in the bones, while phosphorus is also required to make the protein molecules that repair the body tissues as well as for growth

Phosphorus is also important for nerve signaling and normal heartbeat, contraction of the muscles and functioning of the kidney.

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1. The gas left in a used aerosol can is at a pressure of 1 atm at 27( if this can is thrown into a fire, what is the internal p

vova2212 [387]

Answer:

4atm

Explanation:

Step 1:

Data obtained from the question. This include the following:

Initial pressure (P1) = 1atm

Initial temperature (T1) = 27°C

Final temperature (T2) = 927°C

Final pressure (P2) =..?

Step 2:

Conversion of celsius temperature to Kelvin temperature.

This can obtained as follow:

T(K) = T (°C) + 273

Initial temperature (T1) = 27°C

Initial temperature (T1) = 27°C + 273 = 300K

Final temperature (T2) = 927°C

Final temperature (T2) = 927°C + 273 = 1200K

Step 3:

Determination of the new pressure of the gas.

This can be obtained as follow:

P1/T1 = P2/T2

Initial pressure (P1) = 1atm

Initial temperature (T1) = 300K

Final temperature (T2) = 1200K

Final pressure (P2) =..?

1/300 = P2 /1200

Cross multiply to express in linear form

300 x P2 = 1 x 1200

Divide both side by 300

P2 = 1200/300

P2 = 4atm

Therefore, the new pressure of the gas is 4atm.

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The anesthetic procaine hydrochloride is often used to deaden pain during dental surgery. the compound is packaged as a 10.% sol

vichka [17]

10% solution means= $\frac{10g}{100mL}$

= $\frac{0.1g}{1mL}$

= 100 mg/mL

If the dentist inject 0.3 mL, that is equal to 0.3× 100 mg.

If the dentist inject 0.3 mL, that is equal to 30 mg.

So, as anesthetic procaine hydrochloride is often used to deaden pain during dental surgery. the compound is packaged as a 10.% solution (by mass; d = 1.0 g/ml) in water. When our dentist injects 0.30 ml of the solution, 30 mg of procaine hydrochloride (in milligrams) is injected.

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Answer:

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Answer:

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Explanation:

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