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REY [17]
3 years ago
15

During a lunar eclipse, the moon appears to be darkened because _______________ is casting a shadow on it.

Chemistry
1 answer:
stealth61 [152]3 years ago
4 0

Answer:

the earth

Explanation:

because the moon is blocking the light of the sun

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A waste treatment settling tank treats an industrial waste inflow (QIN) of 0.2 m3/s with a suspended particulate concentration (
iren2701 [21]

The effluent flow in concentration and particulate mass flow will be 0.198m³/sec.

<h3>How to calculate the effluent flow?</h3>

It should be noted that the total inflow will be equal to the total outflow. Therefore,

0.2 + 0.048 = 0.05 + We

Collect like terms

Qe = 0.2 + 0.048 - 0.05

Qe = 0.198m³/sec

The concentration will be:

= (360 × 1000)/0.05

= 7200mg/L.

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8 0
2 years ago
What causes gas particles to collide with the walls of their containers?
blondinia [14]

Answer:

Kinetic energy

Explanation:

The kinetic energy of a particle is directly proportional to the temperature of it. An increase in temperature increases the speed in which the molecules move, causing t[he particles to collide with the walls of their containers.

5 0
3 years ago
The _____________ is the temperature at which a substance changes from solid to liquid; ________________ is the temperature at w
Aleksandr-060686 [28]
The _____melting point________ is the temperature at which a substance changes from solid to liquid; _______boiling point_________ is the temperature at which a substance changes from a liquid to as gas; _______vapourisation_________ is the process by which atoms of molecules leave a liquid and become a gas.
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Do all substances absorb heat the same way?
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Since particles are closer together, solids conduct heat better than liquids or gases. Conduction moves heat through a material. It keeps a fire going by spreading the heat through solid material. Radiation is a method of heat transfer that does not require particles to carry the heat energy.


5 0
4 years ago
If the a of a monoprotic weak acid is 2. 6×10−6, what is the ph of a 0. 33 m solution of this acid?
yawa3891 [41]

The pH of the monoprotic weak acid is 2.79.

<h3>What are weak acids?</h3>

The weak acids are the acids that do not fully dissociate into ions in the solution. Strong acids fully dissociate into ions.

The chemical reaction is HA(aq) ⇄ A⁻(aq) + H⁺(aq).

c (monoprotic acid) = 0.33 M.

Ka = 1.2·10⁻⁶

[A⁻] = [H⁺] = x

[HA] = 0.33 M - x

Ka = [A⁻]·[H⁺] / [HA]

2. 6 × 10⁻⁶ = x² / (0.33 M - x)

Solve quadratic equation: [H⁺] = 0.000524 M.

pH = -log[H⁺]

pH = -log(0.000524 M)

pH = 2.79

Thus,  the pH of the monoprotic weak acid is 2.79

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5 0
2 years ago
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