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alisha [4.7K]
3 years ago
15

Based on your knowledge of factors affecting the rate of reaction, why is there a danger of explosions in places such as flour m

ills and coal mines where there are large quantities of powdered, combustible materials? 
Chemistry
1 answer:
Zigmanuir [339]3 years ago
5 0
The large quantities of powdered, combustible materials in silos and coal mines would equate to a higher concentration of materials and technically, a higher surface area. Coincidentally, these places often harbor higher temperatures, increasing the collision frequency. With these three factors combined, there would be an increased reaction rate and this case, a quicker rate for the combustible materials to be released in the form explosions.
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The heat index temperature:___________ a. bines air pressure and temperature in a comfort index b. bines relative humidity and t
kvasek [131]

Answer:

bines relative humidity and temperature in a comfort index

Explanation:

The Heat Index temperature measures how hot it feels when humidity is factored with the air temperature.

It is important for the human body's comfort.

The human body feels warmer in humid conditions it begins to perspire or sweat to cool itself off when the body gets too hot.

The concept of the heat index was developed by George Winterling  in 1978.

The heat index temperature makes assumptions regarding the human body mass and height, clothing, amount of physical activity etc.

The heat index temperature <u>bines relative humidity and temperature in a comfort index.</u>

6 0
3 years ago
Given the reaction below, which is the reduced substance?
Shalnov [3]
Cl2 is the reduced substance
8 0
4 years ago
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3.Write the symbol of the element that has a charge of +1 when it has 71 electrons.​
tigry1 [53]

The symbol : \tt _{72}^{178}Hf^{+1}

<h3>Further explanation </h3>

There are two components that accompany an element, the mass number and atomic number

Atoms are composed of 3 types of basic particles (subatomic particles): <em>protons, electrons, and neutrons </em>

The Atomic Number (Z) indicates the number of protons and electrons in an atom of an element.

Atomic number = number of protons = number of electrons ⇒ neutral number

Atomic mass is the sum of protons and neutrons

Atomic Number (Z) = Atomic mass (A) - Number of Neutrons

The element has 71 electrons and a charge of +1 , so

Number of protons = 71 + 1 = 72

Number of protons = the atomic number = 72

The element with atomic number 72 is Hafnium(Hf)

The atomic mass of Hf = 178 g/mol

4 0
3 years ago
What postulate of the kinetic molecular theory best explains why gases have high fluidity? because collisions between gas partic
slavikrds [6]

the elasticity of gas particle collisions, there is no energy loss when the particles pass one another. Gases are composed of a very large number of small particles, which spread out and avoid contact with one another.

<h3>Which of the following gas postulates from the kinetic molecular theory best explains why pressure exists in gases?</h3>

As the quantity of gas particles in the container rises, so does the frequency of wall interactions and subsequently the pressure of the gas. The average kinetic energy of a gas particle is exclusively dependent on the temperature of the gas, says the theory's final postulate. As the volume of gas particles inside the container grows, more of them will collide with the walls, increasing the pressure and the frequency of collisions.

Learn more about kinetic energy here:

brainly.com/question/26472013

#SPJ4

3 0
2 years ago
How much energy is needed to melt 230 g of ammonia (NH3)? (Heat of fusion is 5.66 kJ/mol)
joja [24]

Moles of ammonia

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1mol requires 5.66KJ energy

13.5mol requires

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4 0
2 years ago
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