Answer:
A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds :)
The salinity increases as the water freezes/evaporates. Glad to help!
486 kPa will be the pressure of gas at 27 degrees.
Explanation:
Data given :
Initial pressure of the gas P1 = 810 kPa
initial temperature of the gas T1 = 227 degrees OR 500.15 K
final pressure of the gas =?
final temperature of the gas = 27 degrees OR 300.15 K
Gay Lussac's law is used to calculate the pressure of the gas at 27 degrees or 300.15 K
= 
P2 = 
Putting the values in the equation:
P2 = 
P2 = 486 KPa
486 Kpa is the pressure of the gas when temperature was reduced to 27 degrees.
Answer:
72.2 % is the percent yield
Explanation:
Percent yield of a reaction is:
(Produced yield / Theoretical yield) . 100
The produced yield is 17.3 g of sulfurous acid.
Let's determine the theoretical yield. The reaction is:
SO₂(g) + H₂O(l) → H₂SO₃(g)
We convert the mass of sulfur dioxide to moles:
18.72 g / 64.06 g/mol = 0.292 moles.
As ratio is 1:1, for 0.292 moles of dioxide we can produce 0.292 moles of acid. Let's convert the moles to mass in order to determine the 100 % yield reaction. (Theoretical yield). 0.292 mol . 82.06 g/ 1 mol = 23.9 g
We replace data → (17.3 g / 23.9 g) . 100 = 72.2%
