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This problem is providing a reaction whereby nitrogen dioxide is produced from nitrogen monoxide and oxygen. Given the rate law, we are asked to quantify the increase in the rate when the concentration of oxygen is tripled. At the end, the result turns out to be an increase by a factor of 3 as well.
<h3>Chemical kinetics:</h3>In chemistry, chemical kinetics is a tool for us to quantify increases or decreases (among others) in the rate of a chemical reaction, when the concentration or even temperature are manipulated. In such a way, with this reaction's rate law:
One can see it is first-order with respect to oxygen and second-order with respect to nitrogen monoxide. Now, since the concentration of oxygen is tripled, we can setup an r2 to r1 ratio, being the former the reaction after the increase in the oxygen's concentration and the former the initial one:
Thus, since the both of the rate constants are the same as no temperature change is pointed out, and the concentration of nitrogen monoxide is not said to have changed, we can cancel them out:
Hence, we plug in the given increase (tripling):
Therefore the increase is done by a factor of 3, which makes sense because the reaction is first-order with respect to oxygen.
Learn more about rate laws: brainly.com/question/13309369
First, you need to find:
One mole of
is equivalent to how many grams?
Well, for this you have to look up the periodic table. According to the periodic table:
The atomic mass of Calcium Ca = 40.078 g (See in group 2)
The atomic mass of <span>Chlorine Cl = 35.45 g (See in group 17)
</span>
As there are two atoms of Chlorine present in, therefore, the atomic mass of would be:
Atomic mass of = Atomic mass of Ca + 2 * Atomic mass of Cl
Atomic mass of = 40.078 + 2 * 35.45 = 110.978 g
Now,
110.978 g of = 1 mole.
75.9 g of = 
= 0.6839 moles.
Hence,
The total number of moles in 75.9g of = 0.6839 moles
According to <span>Avogadro's number,
1 mole = 1 * </span>
molecules
0.6839 moles = 0.6839 * molecules = 
molecules
Ans: Number of molecules in 75.9g of = molecules
-i
One mole of
Well, for this you have to look up the periodic table. According to the periodic table:
The atomic mass of Calcium Ca = 40.078 g (See in group 2)
The atomic mass of <span>Chlorine Cl = 35.45 g (See in group 17)
</span>
As there are two atoms of Chlorine present in
Atomic mass of
Atomic mass of
Now,
110.978 g of
75.9 g of
Hence,
The total number of moles in 75.9g of
According to <span>Avogadro's number,
1 mole = 1 * </span>
0.6839 moles = 0.6839 *
Ans: Number of molecules in 75.9g of
-i
America's age = 243.85 years
<h3>Further explanation</h3>When converting units, list and multiply all the units until you find the unit you want
Time unit conversion
1 year = 365 days
1 day = 24 hours
1 hour = 3600 s
7.69 x 10⁹ seconds to years :