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boyakko [2]
1 year ago
13

Determine the molar concentration of 4 moles of HCL dissolved in 2500 ml of solution​

Physics
1 answer:
Reptile [31]1 year ago
4 0

Answer:

1.6 molar

Explanation:

C=number of moles/volume

convert ml to L

V =2.5L

C= 4/2.5

=1.6 molar

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The plates of a parallel-plate capacitor have constant charges of +Q and?Q. Do the following quantities increase, decrease, or r
sveticcg [70]

Explanation:

(A) Electric field for the parallel plate capacitor is given by :

E=\dfrac{\sigma}{2\epsilon_o}

It is clear that the electric field does not depend on the separation of the plates.

(B) The relation between the electric field and the electric potential is given by :

V=Ed

d is the separation between plates. So, if the separation of the plates is increased, the potential difference increases.

(C) The capacitance of the parallel plate capacitor is given by :

C=\dfrac{A\epsilon_o}{d}

So, the capacitance decreases when the separation of the plates is increased.

(D) The energy stored in the capacitor is given by :

E=\dfrac{1}{2}CV^2

E=\dfrac{1}{2}C(Ed)^2

So, the energy stored in the capacitor  is increased when the separation of the plates is increased.

8 0
3 years ago
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A star is known to be moving at 8.46km/s toward the earth. If you observe the spectral line to be at 5.02nm, at what wavelength
anastassius [24]

Answer:

\lambda_x=5.019858nm

Explanation:

From the question we are told that

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Distance of spectral line \lambda_0= 5.02nm

Generally the equation for wavelength with respect to spectral lines is mathematically given by

\lambda=\lambda _0 *\frac{v}{c}

where

\lambda_0= length\ of\ spectral\ line

c=The\ speed\ of\ light

v= speed\ of\ moving\ object

therefore

\lambda=5.02*10^{-9} *\frac{8.46*10^{12}}{299 792 458*10^9}

\lambda=1.42*10^{-4} nm

Generally the equation for new wavelength is mathematically given as

\lambda_x=\lambda _0-\lambda

\lambda_x=5.02 nm-1.42*10^{-4} nm

\lambda_x=5.02-1.42*10^{-4}

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\lambda_x=5.019858nm

5 0
3 years ago
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4 0
4 years ago
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1. True or False: All sound happens through vibration.<br> A True<br> B False
Genrish500 [490]

Answer:

True

Explanation:

Sound is all about vibrations.

The source of a sound vibrates, bumping into nearby air molecules which in turn bump into their neighbor's, and so forth.

4 0
3 years ago
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Anyone please help thank you
Thepotemich [5.8K]

Answer:

A) earth

B) live

C) live

D) earth

Explanation:

hope i help

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3 years ago
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