Answer:
0.972mol
Explanation:
Given parameters:
Volume of Solution of KCl = 0.486L
Molarity = 2.0M
Unknown:
Number of moles of KCl in solution = ?
Solution:
To find the number of moles of KCl in this solution, use the expression below;
Number of moles = molarity x volume
Insert the parameters and solve;
Number of moles = 0.486 x 2 = 0.972mol
x = 10, y = 20/6
<h3>Further explanation</h3>
Given
one number is three times of the other
their arithmetic mean is 10
Required
The numbers
Solution
Suppose the numbers you are looking for are x and y, then :
x = 3y (equation 1)
The arithmetic mean : the average of values
(x+3y)/2=10
x+3y = 20 (equation 2)
Substitute equation 1 into equation 2
3y+3y=20
6y=20
y = 20/6
from equation 1 :
x= 3 x 20/6
x = 60/6
x = 10
Answer:
D) How many valence electrons the atom contains.
This is the only closest one
because the number of electrons in the outermost shell is the correct answer
Answer:- Melting point of [tex[CCl_4[/tex] is higher than 
where as the vapor pressure of ![CS_2[/tex[ is higher than [tex]CCl_4](https://tex.z-dn.net/?f=CS_2%5B%2Ftex%5B%20is%20higher%20than%20%5Btex%5DCCl_4)
.
Explanations:- Since both the molecules are non polar, the forces of attraction for carbon tetrachloride are comparatively stronger as it's a bigger molecule. We know that, stronger are the forces of attraction, higher is the melting point as more heat is required to break the bonds.
Stronger are the forces of attraction, lower is the vapor pressure as the molecules are more tightly bonded and less molecules goes to the gas phase.
So, melting point of carbon tetrachloride is higher but it's vapor pressure is lower as compared to carbon disulfide.
Answer:
The correct answer is a. chemical bond. See the explanation below, please.
Explanation:
The resulting electrostatic interaction is called ionic bond between ions of opposite charge (one negative and one positive). This allows the attraction between both charges, constituting a chemical compound. Eg the Sodium (Na +) ion combines with the Chlorine (Cl-) ion forming Nacl (sodium chloride, known as table salt).
