A gauge records the pressure over atmospheric pressure (0kpa on the gauge is actually the atmospheric pressure and a reading of 276kpa is 276kpa over atmospheric pressure). That means that means that to find absolute pressure you just add atmospheric pressure (around 1atm (101kpa)) to 286kpa to get 387kpa. I hope this helps.
- Heat energy<span> is the result of the movement of tiny </span>particles<span> called atoms, molecules or ions in solids, liquids and gases. </span>Heat energy can<span> be transferred from one </span>object<span> to another, and the ... It is everything in the universe – anything that has both </span>mass<span> and </span>volume<span> and takes up ... An </span>effect<span> of heat – expansion.</span>
<span>conserved. if its absorbed then there will be no reaction.</span>
Answer:
b. 0.100M
Explanation:
The balanced chemical reaction is: NaOH + HA ⇒ H₂O + NaA
The NaOH and HA react in a 1:1 molar ratio, so at the equivalence point, the amount of NaOH added equals the amount of HA that was present in the solution.
The amount of NaOH that was added can be calculated and set equal to the amount of HA that must have been present to react with it.
n = CV = (0.200 mol/L)(12.5 mL) = 2.50 mmol NaOH = 2.50 mmol HA
Thus, there were 2.50 mmol of HA in 25.0 mL. The concentration can be calculated as follow:
C = n/V = (2.50 mmol)/(25.0mL) = 0.100 M
