Answer: The value of 
is 0.0057
Explanation:
Initial moles of 
= 0.900 mole
Volume of container = 2.00 L
Initial concentration of 
equilibrium concentration of 
[/tex]
The given balanced equilibrium reaction is,
Initial conc. 0.450 M 0 0
At eqm. conc. (0.450 -2x) M (2x) M (x) M
The expression for equilibrium constant for this reaction will be,
![K_c=\frac{[O_2][SO_2]^2}{[SO_3]^2}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B%5BO_2%5D%5BSO_2%5D%5E2%7D%7B%5BSO_3%5D%5E2%7D)
we are given : x = 0.055
Now put all the given values in this expression, we get :
Thus the value of the equilibrium constant is 0.0057
V(C₄H₆O₃) = 5.00 mL.
d(C₄H₆O₃) = 1.08 g/mL.
m(C₄H₆O₃) = V(C₄H₆O₃) · d(C₄H₆O₃).
m(C₄H₆O₃) = 5.00 mL · 1.08 g/mL.
m(C₄H₆O₃) = 5.4 g.
n(C₄H₆O₃) = m(C₄H₆O₃) ÷ M(C₄H₆O₃).
n(C₄H₆O₃) = 5.4 g ÷ 102 g/mol.
n(C₄H₆O₃) = 0.0529 mol.
n(C₇H₆O₃) = 2.08 g ÷ 138.1 g/mol.
n(C₇H₆O₃) = 0.015 mol; limiting reactant.
From chemical reaction: n(C₄H₆O₃) : n(C₉H₈O₄) = 1 : 1.
n(C₉H₈O₄) = 0.015 mol.
m(C₉H₈O₄) = 0.015 mol · 180.16 g/mol.
m(C₉H₈O₄) = 2.71 g; theoretical yield.
percent yield od aspirine = 2.57 g ÷ 2.71 g · 100% = 94.83%.
Answer:
the answer is d which is soap solution because it's a soap solution that can measure the degree of hardness of a water if the water forms with this soap solution then the water is hard but if the water forms foam with soap then it is soft
Answer:
a. physical
b.chemical
c.chemical
d.physical
Explanation:
A. You can easily unbend the wire and reverse the change
D. No new products were created
THE ANSWER IS B AND C AS CHEMICAL CHANGES
