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PolarNik [594]
3 years ago
13

This infectious disease requires a special mask for protection

Chemistry
2 answers:
11111nata11111 [884]3 years ago
6 0

Answer:

the black plague

Explanation:

Yuliya22 [10]3 years ago
6 0

Answer:

no

Explanation:

becuase the only way you need to have a special mask is if it was constantly changing

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Explained how natural factors have changed the surface and atmosphere of the Earth over time?
Ne4ueva [31]

Answer:

The earth's climate is influenced and changed through natural causes like volcanic eruptions, ocean currents, the Earth's orbital changes, solar variations and internal variability. is short-term cooling. Volcanic eruptions pump out clouds of dust and ash, which block out some sunlight.

Explanation:

8 0
2 years ago
A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25.0°c. what is the magnitude of k at 75.0°c if ea =
IgorC [24]
According to this formula:
K= A*(e^(-Ea/RT) when we have K =1.35X10^2 & T= 25+273= 298K &R=0.0821
Ea= 85.6 KJ/mol So by subsitution we can get A:
1.35x10^2 = A*(e^(-85.6/0.0821*298))
1.35x10^2 = A * 0.03
A= 4333
by substitution with the new value of T(75+273) = 348K & A to get the new K
∴K= 4333*(e^(-85.6/0.0821*348)
  = 2.16 x10^2
8 0
3 years ago
The temperatures of the two glasses of water shown in the photograph above are 30°C and 0°C. Which of the following is a correct
maria [59]
D! the molecules of the warmer water would have a higher average kinetic energy :)
7 0
3 years ago
Explain, in terms of electrons, why the radius of a potassium atom is larger than the radius of a potassium ion in the ground st
barxatty [35]
Because the Potassium ion loses an electron, the electrons come a little closer to the nucleus because they are attracted to the protons. This makes the ion smaller in radius
4 0
3 years ago
As a chemical reaction occurs, the thermometer in the container records a drop in temperature. What is true of the reaction?
nadya68 [22]
<span>When a chemical reaction occurs and the thermometer in the container records a drop in temperature t</span>he reaction is exothermic because heat was released by the reaction.

 <span>B. The reaction is exothermic because heat was released by the reaction. is your answer.

Hoped I helped!</span>
4 0
3 years ago
Read 2 more answers
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