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Wewaii [24]
4 years ago
12

How does the sun transfer heat energy to various materials?

Chemistry
2 answers:
seraphim [82]4 years ago
7 0
The answer is c. radiation.
BARSIC [14]4 years ago
4 0
I believe the answer is C.
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What may explode in a combustible atmosphere?
shusha [124]

Explanation:

<h2><em><u>Dust explosions can occur where any dispersed powdered combustible material is present in high-enough concentrations in the atmosphere or other oxidizing gaseous medium, such as pure oxygen</u></em></h2>
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3 years ago
Covalent bonds are formed from the sharing of valence electrons.<br> • true or false
IRINA_888 [86]

Answer:

true

Explanation:

it ture because it true

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If 2 acid have ph value 3 and 5 respectively, which will be more acidic? Why?​
nataly862011 [7]

Answer:

A lower ph is always more acidic, due to the increased concentration of hydrogen ions in the solution/substance.

A ph of 3 is 100 times more acidic than a pH of 5, and this is due to the increments on the scale.

6 0
3 years ago
Hello can someone pls help me with this question! (Please explain why)
denis23 [38]

Answer:

letter A.

Explanation:

the rate of a chemical reaction can be raised by increasing the surface area of a solid reactant. this is done by cutting the substance into small pieces, or by grinding it into a powder.if the surface area of a reactant is inceased: more particles are exposed to the other reactant.

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8 0
3 years ago
You had a closed tank of air at a pressure of 4 atm and temperature of 20 degrees Celsius. When the tank and the air are heated
notka56 [123]

Answer:

The pressure will be 4.27 atm.

Explanation:

Gay-Lussac's law can be expressed mathematically as follows:

\frac{P}{T} =k

Where P = pressure, T = temperature, K = Constant

This law indicates that the quotient between pressure and temperature is constant.

This law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.

In short, when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases.

You want to study two different states, an initial state and a final state. You have a gas that is at a pressure P1 and a temperature T1 at the beginning of the experiment. By varying the temperature to a new value T2, then the pressure will change to P2, and the following will be fulfilled:

\frac{P1}{T1} =\frac{P2}{T2}

In this case:

  • P1= 4 atm
  • T1= 20 C= 293 K (being 0 C= 273 K)
  • P2= ?
  • T2= 40 C= 313 K

Replacing:

\frac{4 atm}{293 K} =\frac{P2}{313 K}

Solving:

P2= 313 K* \frac{4 atm}{293 K}

P2= 4.27 atm

<u><em>The pressure will be 4.27 atm.</em></u>

8 0
3 years ago
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