Answer:
Explanation:
The Sebacic acid has strong hydrocarbon content which make it insoluble in water. Treating the unknown sample with a base for example NaOH will increase the solubility of the Sebacic acid because the carboxylic acid group will react with the base to form soluble ionic salt. The Sebacic acid is completely dissolved in the base
The resulting solution can be titrated with HCl until there is a color change signifying end of neutralization. The mole of NaOH present before the organic acid is noted, then after titration the mole of the HCl acid is subtracted from the initial mole of the base; this will give the carboxylates present in the solution.
It is B because I did it back in 1999
Answer:
There are 1.05 x 10²⁴ molecules in 48.6 g N₂
Explanation:
1 mol of N₂ has a mass of (14 g * 2) 28 g.
Then, 48.6 g of N₂ will be equal to (48.6 g *(1 mol/ 28 g)) 1.74 mol.
Since there are 6.022 x 10²³ molecules in 1 mol N₂, there will be
(1.74 mol *( 6.022 x 10²³ / 1 mol)) 1.05 x 10²⁴ molecules in 1.74 mol N₂ (or 48. 6 g N₂).
Answer: d) -705.55 kJ
Explanation:
Heat of reaction is the change of enthalpy during a chemical reaction with all substances in their standard states.
Reversing the reaction, changes the sign of
On multiplying the reaction by , enthalpy gets half:
Thus the enthalpy change for the given reaction is -705.55kJ
well if you round to the nearest cent the number 0.332 move the decimal down 2 time so it would be 33 it the the answer would be "a"
im sorry if im wrong im trying my best to answer correctly please don't report my answer cause brainly mighty remove my account again.xd