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:
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:
Therefore, option c. is correct.
Learn more about atoms here:
brainly.com/question/11411852
Answer:
Yes, it is possible. Let us consider an example of two solutions, that is, solution A having 20 percent mass RbCl (rubidium chloride) and solution B is having 15 percent by mass NaCl or sodium chloride.
It is found that solution A is having more concentration in comparison to solution B in terms of mass percent. The formula for mass percent is,
% by mass = mass of solute/mass of solution * 100
Now the formula for molality is,
Molality = weight of solute/molecular weight of solute * 1000/ weight of solvent in grams
Now molality of solution A is,
m = 20/121 * 1000/80 (molecular weight of RbCl is 121 grams per mole)
m = 2.07
Now the molality of solution B is,
m = 15/58.5 * 1000/85
m = 3.02
Therefore, in terms of molality, the solution B is having greater concentration (3.02) in comparison to solution A (2.07).
The answer is B. Decreasing the cylinder volume decreases the amount of space the gas has to occupy there for increasing pressure
Answer:
Conductivity meter
Explanation:
All of the other choices measure pH and can tell you when the pH changes, which is how you know the neutralization reaction has occurred. A conductivity meter does not measure pH.
