Answer:
29.256 torr.
Explanation:
Number of moles
Glycerin:
Molecular weight of glycerin = (12*3) + (1*8) + (16*3)
= 36 + 8 + 48
= 92 g/mol
Number of moles = mass/molar mass
= 25.2/92
= 0.274 mol
Water:
Converting g/ml to g/l,
1000 ml = 1 l
= 1 g/ml * 1000 ml/1l
= 1000 g/l
Mass = (density * volume)
= 1000*0.124
= 124 g.
Molar mass of water = (1*2) + 16
= 18 g/mol
Number of moles = mass /molar mass
= 126/18
= 6.89 mol
P°solution = xsolvent * P°solvent
Where,
xwater = xsolvent = mole fraction of water.
Mole fraction is defined as the number of moles of a component of a solution divided by the total number of moles present in that solution.
xwater = mole of water/total mole of solution
Total mole = 6.89 + 0.274
= 7.164 moles
xwater = 6.89/7.164
= 0.962
P°solution = xsolvent * P°solvent
P°solution = 31.8 * 0.962
= 29.256 torr
Answer:
615 g
Explanation:
In order to convert from moles of any given substance into grams, we have to use said substance's <em>molar mass</em>, as follows:
- # moles * Molar mass = grams of substance.
Thus, we now <u>calculate the molar mass of beryllium iodide</u>, BeI₂, using the <em>molar masses of the elements</em>:
- Molar Mass of BeI₂ = Molar Mass of Be + (Molar Mass of I)*2 = 262.821 g/mol
Finally we <u>calculate how many grams are there in 2.34 moles of BeI₂</u>:
- 2.34 mol * 262.821 g/mol = 615 g
Answer:
Explanation:
According to the law of mass action:-
The rate of the reaction is directly proportional to the active concentration of the reactant which each are raised to the experimentally determined coefficients which are known as orders. The rate is determined by the slowest step in the reaction mechanics.
Order of in the mass action law is the coefficient which is raised to the active concentration of the reactants. It is experimentally determined and can be zero, positive negative or fractional.
The order of the whole reaction is the sum of the order of each reactant which is raised to its power in the rate law.
From the reaction given that:-
The expression for the rate is:-
Given that;- k= /Ms
[P] = M
Thus,
1:3
The ratio of Al3+ ions to Cl− ions in the chemical formula is 1:3.
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