Answer: option c. the mixing of solute and solvent molecules
Explanation:
Answer:
Option C:- Concentration
Explanation:
Coal dust explosion can cause lots of damage. To avoid
this, the amount or concentration of coal dust per unit
volume or MEC is measured with the various conditions
of coal storage such as the particle size, moisture of coal,
degree of dispersion and delayed time of ignition source
to prevent the coal dust explosion which aims to study
and design the explosion safety measures for coal dust
handing installations. The results present that moisture
content in coal has more effect on dust explosion. The
smaller size of particle, low moisture in coal and high
coal dust dispersion can increase the possibility or risk of
dust explosion.
Answer:
Samira's model is incorrect because not all atoms are accounted for
Explanation:
The image of Samira's model has been attached to this answer to enhance the explanation.
What is depicted in that model is rightly regarded as a chemical change. In a chemical change atoms of substances are rearranged as new substances are formed.
However, all atoms in the products must also be found in at least one of the reactants. In this case we have an atom in one of the products that is not accounted for. Hence the model is incorrect.
Answer:
7.0625
Explanation:
The trapezoidal rule ( this is an approximation ) tells you that the average of the left and right endpoints should be as follows,
where 
... at this point we can apply the Riemann Formula, in order to divide the interval 0 ≤ x ≤ 2 into n = 4 subintervals of length 
.
,
= 
- Let's calculate the sub intervals for each, substituting to receive our solution.
( this is as 0⁴ is 0 )
( this is as 
)
( 2 
1⁴ is 2 )
( this is as 
)
And finally 
, as 2⁴ is 16. Therefore, let us plug in our solutions for each into the primary expression, and solve,
= 7.0625 - this is our solution. The correct answer is option c, and i hope this clarifies why.
