The percent by volume of a solution : 19.23%
<h3>Further explanation</h3>
Given
50 ml of ethanol
210 ml of water
Required
The percent by volume of a solution
Solution
Percent Volume (% v/v) : volume (ml) of solute/100 ml of solution ⇒ ratio of the volume of the solute to total volume of the solution

solute= Ethanol
solvent=water
Solution = solute+solvent
Total volume of the solution :

Percent by volume :

<span> NaNO3: Soluble 2. AgBr: Insoluble 3. NH4OH: Soluble 4. Ag2CO3: Insoluble 5. NH4Br: Soluble 6. BaSO4: Insoluble 7. Pb(OH)2: Insoluble 8. PbCO3: Insoluble</span>
Sb has the largest atomic radius by 206
Water Is A Liquid And Gravity Pulls Objects Up
He answers is B It equals the rate of the formation of SO3