Atoms are the smallest division of the element. The potassium atoms present in the 235 gm of the compound is
atoms.
<h3>What is the number of atoms?</h3>
Given,
- Mass (m) of Potassium sulfide
= 235 gm - Molar mass (M) of Potassium sulfide = 110.26 g/mol
Calculate the number of moles as:
![\begin{aligned}\rm Moles (n) &= \dfrac{\rm mass}{\rm molar\;\rm mass}\\\\&= \dfrac{235}{110.26}\\\\&=2.13\;\rm mol\end{aligned}](https://tex.z-dn.net/?f=%5Cbegin%7Baligned%7D%5Crm%20Moles%20%28n%29%20%26%3D%20%5Cdfrac%7B%5Crm%20mass%7D%7B%5Crm%20molar%5C%3B%5Crm%20mass%7D%5C%5C%5C%5C%26%3D%20%5Cdfrac%7B235%7D%7B110.26%7D%5C%5C%5C%5C%26%3D2.13%5C%3B%5Crm%20mol%5Cend%7Baligned%7D)
In the given compound
, there are two atoms of potassium and one atom of sulphur.
If, 1 mole =
atoms of potassium
Then, 2.13 moles = X atoms
Solving for X:
![2.13 \times 2 \times 6.022 \times 10^{23} = 2.57 \times 10^{24}](https://tex.z-dn.net/?f=2.13%20%5Ctimes%202%20%5Ctimes%206.022%20%5Ctimes%2010%5E%7B23%7D%20%3D%202.57%20%5Ctimes%2010%5E%7B24%7D)
Therefore, option c.
is correct.
Learn more about atoms here:
brainly.com/question/11411852
<h3><u>Answer;</u></h3>
C. increasing the surface area of Fe2O3
<h3><u>Explanation;</u></h3>
- The rate of reaction refers to the speed at which products are formed from reactants.
- The rate of any chemical reaction depends on a number of factors which include, surface area, temperature, concentration of reactants among others.
- <em><u>When solids and liquids react, increasing the surface area of the solid will increase the rate of reaction. Thus, decrease in the size of particles causes an increase in the total surface area of the solid and therefore increasing the rate of reaction.</u></em>
So basically Positive reinforcement is when you give someone something for showing a good behavior, and a negative reinforcement is giving someone a consequence for showing bad behavior.
Hope this helps:)
The empirical formula of arginine is C3H7N2O2.
<h3>What is the empirical formula of arginine?</h3>
Now we know that the empirical formula is the formula that shows the ratio of the atoms present in the compound.
Now we know that;
C - 41.368/12 H - 8.101/1 N - 32.162/14 O - 18.369/16
C - 3.445 H - 8.101 N - 2.297 O - 1.148
Dividing through by the lowest ratio;
C - 3.445/1.148 H - 8.101/1.148 N - 2.297/1.148 O - 1.148/1.148
C - 3 H - 7 N - 2 O - 2
C3H7N2O2
Learn more about arginine:brainly.com/question/13589467
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