Answer:
The answer is
<h2>4.69 mL</h2>Explanation:
The volume of a substance when given the density and mass can be found by using the formula
From the question
mass of wood = 4.6 g
density = 0.98 g/mL
It's volume is
We have the final answer as
<h3>4.69 mL</h3>Hope this helps you
The pH of the solution : 12
<h3>Further explanation</h3>Reaction
HCOOH + NaOH ⇒ HCOONa + H₂O
mol HCOOH =
mol NaOH =
Mol NaOH>mol HCOOH ⇒ at the end of the reaction there will be a strong base remains from mol NaOH, so that the pH is determined from [OH⁻]
ICE method :
HCOOH + NaOH ⇒ HCOONa + H₂O
4 5
4 4 4 4
0 1 1 1
Concentration of [OH⁻] from NaOH :
pOH=-log[OH⁻]
pOH=-log 10⁻²=2
pH+pOH=14
pH=14-2=12