Answer:
The concentration of is
The number of ion is
Explanation:
Generally the solubility product constant of HgS(s) is
This solubility product constant is mathematically represented as
Since the HgS is saturated it implies that the concentration of sulfur ion is the same as that of mercury ion s
=>
=>
substituting values
=>
From above mole of is equal to 1 L
Then x mole of will be equal to 1000 L
Therefore
=>
Now the number of ions are in 1000 L of the solution is mathematically represented as
Where is the avogadro's constant which has a value of
Substituting value
<span>(a) Assuming the amount of O2(g) is not limiting the reaction, a mass of 4.23g of Ca(s) will produce an equal mass of CaO(s), hence it will produce 4.23g of CaO(s).
According to their respective molar masses, we have the following CaO molar mass :
Molar mass of Ca + Molar mass of O = 40.1 + 16 = 56.1 g/mol
4.23g of Ca will then produce : 4.23 / 56.1 = 0,07540107 mol of CaO.
(b) With the same reasonment as above, and assuming the amount of Ca is not limiting, we have :
2.87g of O2 will produce : 2.87 / 56.1 = 0,051158645 mol of CaO.
(c) From (a) and (b) answers, we can conclude that the reactant that produces less mol of CaO is limiting the reaction. Hence following the given masses, O2 is the limiting reactant.
(d) Knowing the molar mass of CaO is 56.1 g/mol and knowing that O2 is the limiting reactant, we also know the reaction can produce a maximum of 0,051158645 mol of CaO can be produced.
So we can conclude we will produce :
56.1 * 0,051158645 = 2.87g of CaO.</span>
Answer : The formal charge on central Cl atom is -1.
Explanation :
The given molecule is,
First we have to determine the total number of valence electrons in,
As we know, chlorine has 7 valence electrons.
Total number of valence electrons in = 3(7) + 1 = 22 electrons
Electrons used in bonding pair = 4
Electrons used as lone pair = 22 - 4 = 18
Now we have to calculate the formal charge on central Cl atom.
- Formal charge = Number of valence electrons of a central atom - (2 × Number of lone pairs) - Number of bond pairs
Formal charge on central Cl atom = 7 - (2 × 3) -2 = -1
Therefore, the formal charge on central Cl atom is -1.
The lewis-dot structure of is shown below.
Answer:
The answer is
<h2>241.15 kPa</h2>
Explanation:
To find the pressure in kilopascals we must first find the pressure in Pascal
To find the pressure in Pascal we use the conversion
1 atm = 101 , 325 Pa
If 1 atm = 101325 Pa
then 2.38 atm = 2.38 × 101325
= 241153.5 Pa
Converting it into kPa we have the final answer as
<h3>241.15 kPa</h3>
Hope this helps you
Na is the symbol for sodium.