Answer:
suspension
Explanation:
a mixture in which particles can be seen and easily separated by settling or filtration.
hope this helps
Answer:
223.5 g
Explanation:
The formula between the number of moles, mass and Mr can be used to convert moles to grams.
<em>Number of moles = mass ÷ Mr</em>
So, mass = number of moles × Mr
Mr of Li₂O = (6.9 × 2) + 16 = 29.8
∴ Mass = 7.5 × 29.8 = <u>223.5 g</u>
= 18.02 g/mol) im sure its that
Answer:
[AB] = 0.66M
Explanation:
rate = change in concentration/time
Initial concentration of AB = 1.5M
Let the concentration of AB after 10.3s be y
Therefore, rate = 1.5 - y/10.3
The rate equation is given as
rate = k[AB]^2 = 0.2y^2
0.2y^2 = 1.5 - y/10.3
2.06y^2 = 1.5 - y
2.06y^2 + y - 1.5 = 0
Using the quadratic formula
y = [-1 + or - √(1^2 -4×2.06×-1.5)/2(2.06)]
The value of y must be positive
y = (-1 + √13.36)/4.06 = -1+3.66/4.06 = 2.66/4.06 = 0.66
Concentration of AB after 10.3s is 0.66M
Answer:
See explanation
Explanation:
We must remember that the D / L nomenclature refers to the orientation of the hydroxyl group on carbon 5. If the "OH" is on the right we will have a D configuration. Yes, the "OH" is on the left we will have an L configuration. (See figure 1)
Now, the orientation of this "OH" has nothing to do with the ability of the molecule to deflect polarized light. If the molecule deflects light to the left we will have the symbol "(-)" (levorotation) if the molecule deflects light to the right we will have the symbol "(+)" (dextrorotation).
So in the "D" configuration, we can have both a right (+) and a left (-) deviation.
I hope it helps!