Answer:
The number of moles of hydrochloric acid are 0.861
Explanation:
In first solution, the [HCl] is 11.7 M, which it means that 11.7 moles are present in 1 liter.
So we took 25 mL and we have to know how many moles, do we have now.
1000 mL ____ 11.7 moles
25 mL _____ (25 . 11.7)/1000 = 0.2925 moles
This are the moles, we add to the solution where the [HCl] is 3.25 M
In 1000 mL __ we have __ 3.25moles
175 mL ____ we have __ (175 . 3.25)/1000 = 0.56875 moles
Total moles: 0.2925 + 0.56875 = 0.861 moles
M(C)=73.5 g
m(H)=4.20 g
m(Cl)=72.3 g
mass of compound
m=m(C)+m(H)+m(Cl)
m=73.5+4.20+72.3=150 g
w(H)=100m(H)/m
w(H)=100*4.20/150=2.8%
w(Cl)=100m(Cl)/m
w(Cl)=100*72.3/150=48.2%
w(C)=100-w(H)-w(Cl)
w(C)=100-2.8-48.2=49.0%
The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as system mass cannot change quantity if it is not added or removed. Hence, the quantity of mass is "conserved" over time.
Answer:
Ionic Exergonic
Explanation:
Exergonic reactions have negative Gibbs free energy and hence are spontaneous.
Endergonic reactions have negative Gibbs free energy and are non-spontaneous and low temperature.
Endergonic reactions require external supply of energy. But such reactions can be made spontaneous or favorable by coupling with exergonic reaction via a common intermediate.
Therefore, the correct answer is Ionic Exergonic.
I think the fatty acids that may be used to make a fat that is liquid at room temperature are One plamitic acid, one stearic acid, and one oleic acid.
Fatty acids are composed of linked chains of carbon atoms with an organic acid group at the end of the chain. Liquid fats or Oils are mainly obtained from plants or fish sources, and have high percentages of unsaturated fatty acids.
