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mina [271]
2 years ago
5

Which one of the following salts, when dissolved in water, produces the solution with a ph closest to 7.00? 110) a) kh co3 b) cs

cl c) cao d) nh4l
Physics
1 answer:
s344n2d4d5 [400]2 years ago
4 0

CsCl, when dissolved in water, produces the solution with a ph closest to 7.00.

<h3>What is pH?</h3>

In chemistry, pH, historically denoting "potential of hydrogen" (or "power of hydrogen"), is a scale used to specify the acidity or basicity of an aqueous solution.

Acidic solutions (solutions with higher concentrations of H+ ions) are measured to have lower pH values than basic or alkaline solutions.

The pH scale is logarithmic and inversely indicates the concentration of hydrogen ions in the solution.

Solutions with a pH less than 7 are acidic, and solutions with a pH greater than 7 are basic.

Solutions with a pH of 7 at this temperature are neutral (e.g. pure water).

The neutral value of the pH depends on the temperature – being lower than 7 if the temperature increases above 25 °C.

The pH value can be less than 0 for very concentrated strong acids, or greater than 14 for very concentrated strong bases.

To learn more about pH: brainly.com/question/491373

#SPJ4

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A nonconducting spherical shell, with an inner radius of 4 cm and an outer radius of 6 cm, has charge spread non uniformly throu
Aloiza [94]
In other words a infinitesimal segment dV caries the charge 
<span>dQ = ρ dV </span>

<span>Let dV be a spherical shell between between r and (r + dr): </span>
<span>dV = (4π/3)·( (r + dr)² - r³ ) </span>
<span>= (4π/3)·( r³ + 3·r²·dr + 3·r·(dr)² + /dr)³ - r³ ) </span>
<span>= (4π/3)·( 3·r²·dr + 3·r·(dr)² + /dr)³ ) </span>
<span>drop higher order terms </span>
<span>= 4·π·r²·dr </span>

<span>To get total charge integrate over the whole volume of your object, i.e. </span>
<span>from ri to ra: </span>
<span>Q = ∫ dQ = ∫ ρ dV </span>
<span>= ∫ri→ra { (b/r)·4·π·r² } dr </span>
<span>= ∫ri→ra { 4·π·b·r } dr </span>
<span>= 2·π·b·( ra² - ri² ) </span>

<span>With given parameters: </span>
<span>Q = 2·π · 3µC/m²·( (6cm)² - (4cm)² ) </span>
<span>= 2·π · 3×10⁻⁶C/m²·( (6×10⁻²m)² - (4×10⁻²m)² ) </span>
<span>= 3.77×10⁻⁸C </span>
<span>= 37.7nC</span>
6 0
4 years ago
The range of audible frequencies is from about 20.0 hz to 2.00×104 hz . what is range of the wavelengths of audible sound in air
TiliK225 [7]
The wavelength is related to the frequency by the relationship:
\lambda= \frac{v}{f}
where v is the wave speed and f is its frequency.

The speed of sound in air is v=344 m/s. The lowest frequency is f=20.0 Hz, so the corresponding wavelength is
\lambda_1 =  \frac{v}{f_1}= \frac{344 m/s}{20.0 Hz}=17.2 m
The highest frequency is f_2 = 2.00 \cdot 10^4 Hz, so the corresponding wavelength is
\lambda_2 =  \frac{v}{f_2}= \frac{344 m/s}{2.00 \cdot 10^4 Hz}=0.017 m

Therefore, the range of wavelengths of audible sound in air is
[0.017 m - 17.2 m]
4 0
3 years ago
A flash of red light and a flash of blue light enter a glass cube perpendicular to its surface at the same time. after passing t
Wewaii [24]

A flash of red light and a flash of blue light enter a glass cube perpendicular to its surface at the same time. after passing through the block, the red light pulse exits first.

For any medium, other than vacuum, the index of refraction for red light is slightly lower (closer to 1 ) than that for blue light. This means that when light goes from vacuum (or air) into glass, the red light deviates from its original direction less than does the blue light. Also, as the light reemerges from the glass into vacuum (or air), the red light again deviates less than the blue light. If the two surfaces of the glass are parallel to each other, the red and blue rays will emerge traveling parallel to each other, but displaced laterally from one another.

what is refractive index?

The ratio between the speed of light in medium to speed in a vacuum is the refractive index. When light travels in a medium other than the vacuum, the atoms of that medium continually absorb and re-emit the particles of light, slowing down the speed light.

learn more about refractive index from here: brainly.com/question/28203787

#SPJ4

7 0
2 years ago
Como se representa un intervalo de tiempo
atroni [7]
Come se in so mi tiempo si
6 0
2 years ago
How much power is required to lift a 2.0 kg mass at a speed of 2.0 m/s? a. 2.0 W c. 9.8 W b. 4.0 W d. 39 W
liberstina [14]

Answer:

d: 39W

Explanation:

Power(P) = w/t = F*d/t = F*v = m*a*v= 2*9.8*2 = 39.2W

6 0
3 years ago
Read 2 more answers
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