Answer:
The molarity of ethanol is 5.8*10⁻³ M.
Explanation:
Molar concentration is a measure of the concentration of a solute in a solution, be it some molecular, ionic or atomic species.
Molarity or Molar Concentration is the number of moles of solute that are dissolved in a certain volume. It is calculated by dividing the moles of the solute by the volume of the solution:
Molarity is expressed in units .
Being the molar mass of ethanol 46 , then the number of moles that 40 grams of ethanol contain is calculated by:
So, being:
- number of moles of solute= 0.87 moles
- volume 150 L
Replacing in the definition of molarity:
Solving:
Molarity= 5.8*10⁻³ M
<u><em>The molarity of ethanol is 5.8*10⁻³ M.</em></u>
The ion hydroxide is common to all alkalis.
The resulting pressure will be 2.03 atm.
<u>Explanation:</u>
As per the Boyle's law, the volume of a particular mass of a gas is inversely proportional to its pressure applied. As pressure increases, the volume decreases.
P1V1 = P2V2
Here P1 = 1.35 atm
V1 = 5.15 L
P2 = ?
V2 = 3.43 L
The above equation can be rewritten to get P2 as,
P2 =
Now, we can plugin the above values as,
P2 =
= 2.03 atm
As per the law said, the volume is compressed as the pressure increases.
Answer: water solutions conducts charge
Explanation: solid sodium chloride is n insulator.NaCl is dissolved in water
In ionic forms. In solution there are Na+ and Cl- ions which can transfer charge.