Answer:
These metals are less reactive than the neighbouring alkali metal. Magnesium is less active than sodium; calcium is less active than potassium; and so on. These metals become more active as we go down the column.
Explanation:
Magnesium is more active than beryllium; calcium is more active than magnesium; and so on.
Answer : The value of for is .
Solution : Given,
Solubility of in water =
The barium carbonate is insoluble in water, that means when we are adding water then the result is the formation of an equilibrium reaction between the dissolved ions and undissolved solid.
The equilibrium equation is,
Initially - 0 0
At equilibrium - s s
The Solubility product will be equal to,
Now put all the given values in this expression, we get the value of solubility constant.
Therefore, the value of for is .
Answer:
C.)
Explanation:
The general equilibrium expression looks like this:
In this expression,
-----> K = equilibrium constant
-----> uppercase letters = formulas
-----> lowercase letters = balanced equation coefficients
Solids are not included in the expression, so Ca(HCO₃)₂(s) and CaO(s) should be left out. The products should be in the numerator and the reactants are in the denominator. This makes the expression:
<----- Equilibrium expression
<----- Insert gaseous formulas
<----- Insert coefficients
Answer is 120
Explanation
X is total
if 25% were boys. Then .25x = 40
Divide both sides by .25
X = 160
Total- boys = girl dogs
160-40 = girl dogs
120= girl dogs
Have a nice day. Hope this is helpful.
Answer:
<u>1)Thus based on the diagram , the values of principle quantum number that can be assigned to the electrons are : 2,3 and 4.</u>
<u>2)This quantum number tells us the shell in which an electron is present and how far it is roughly from the nucleus.</u>
Explanation:
According to the rules of electron filling in subshells in quantum mechanics , <em>Aufbau's principle states that :</em>
<em>"An electron must be filled in a lower energy state or subshell and then higher. If they have the same energy , the one with lesser principal quantum number will be filled first."</em>
Thus ,
The series of filling goes like:
Thus , the subshells in the given information have 1,3 and 1 orbitals respectively. Thus it has to be which is possible in two cases :
1)Thus based on the diagram , the values of principle quantum number that can be assigned to the electrons are : 2,3 and 4.
2)This quantum number tells us the shell in which an electron is present and how far it is roughly from the nucleus.