Answer:
The no. of moles of CaCl₂ are needed = 3.1 mol.
Explanation:
- From the balanced reaction:
<em>2AgNO₃ + CaCl₂ → 2AgCl + Ca(NO₃)₂,</em>
It is clear that 2 mol of AgNO₃ react with 1 mol of CaCl₂ to produce 2 mol of AgCl and 1 mol of Ca(NO₃)₂.
<u><em>Using cross multiplication:</em></u>
2 mol of AgNO₃ need → 1 mol of CaCl₂ to react completely, from stichiometry.
6.2 mol of AgNO₃ need → ??? mol of CaCl₂ to react completely.
∴ The no. of moles of CaCl₂ are needed = (1 mol)(6.2 mol)/(2 mol) = 3.1 mol.
In acidic solutions you have H+ but in basic solutions you have OH-.
You need know that for to balance the reaction.
Technology of course and Pliers make work easier by holding parts. By gripping small things in awkward locations.
Answer:
Rabbbits are scared so if there is an increase in the snake population they would try and hide and run from it bur hawks also prey on rabbits but not every hawk so Im going with bthe snake answer .
Explanation:
Answer: -
IE 1 for X = 801
Here X is told to be in the third period.
So n = 3 for X.
For 1st ionization energy the expression is
IE1 = 13.6 x Z ^2 / n^2
Where Z =atomic number.
Thus Z =( n^2 x IE 1 / 13.6)^(1/2)
Z = ( 3^2 x 801 / 13.6 )^ (1/2)
= 23
Number of electrons = Z = 23
Nearest noble gas = Argon
Argon atomic number = 18
Number of extra electrons = 23 – 18 = 5
a) Electronic Configuration= [Ar] 3d34s2
We know that more the value of atomic radii, lower the force of attraction on the electrons by the nucleus and thus lower the first ionization energy.
So more the first ionization energy, less is the atomic radius.
X has more IE1 than Y.
b) So the atomic radius of X is lesser than that of Y.
c) After the first ionization, the atom is no longer electrically neutral. There is an extra proton in the atom.
Due to this the remaining electrons are more strongly pulled inside than before ionization. Hence after ionization, the radii of Y decreases.
