Answer:
The Rf value of ibuprofen increases
Explanation:
TLC involves the elution of a solute using a mobile phase(solvent). The stationary phase is made of an adsorbent such as silica.
The extent of interaction between the solute and the mobile phase affects the Rf value. The greater the interaction between the solute and the solvent, the greater the Rf value.
On the other hand, the polarity of the solvent and the solute also affects the Rf value. If the solvent is changed from t-butyl methyl ether to acetone, the Rf value for ibuprofen increases because ibuprofen is polar and acetone is also polar hence there is greater interaction between the solvent and solute.
Answer:
Partial pressure of oxygen = 23.38 kpa (Approx)
Explanation:
Given:
Amount of oxygen = 23.15%
Amount of nitrogen = 76.85%
Pressure (missing) = 101 kpa
Find:
Partial pressure of oxygen
Computation:
Partial pressure of oxygen = [Amount of oxygen x Pressure]/100
Partial pressure of oxygen = [23.15% x 101]/100
Partial pressure of oxygen = 23.38 kpa (Approx)
Answer:
(a) HCl is the limiting reactant.
(b) 28.45 g
(c) 19.10 g.
Explanation:
(a) 4HCL(aq) + MnO2(s) ----> MnCl2(aq) + 2H2O(l) + Cl2(g)
Using the relative atomic masses:
4 * (1.008 + 35.45( g of HCl react with (54.983 + 2*15.999) g of MnO2.
145.832 g HCl reacts with 86.981 g MnO2.
So 47.7 g HCl reacts with (86.981 / 145.832) * 47.7 = 28.451 g MnO2.
We have 42.5 g of MnO2 so HCl is the limiting reactant.
(b) The theoretical yield of Cl2 is (70.9 /86.981) * 28.451 = 23.91 g.
(c) The actual yield of chlorine is 23.91 * 0.799 = 19.10 g.
Answer:
B is the answer
Explanation:
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