Answer: a) is the limiting reagent
b) 3.59 g
c) 11.6g
Explanation:
To calculate the moles :
According to stoichiometry :
a) 9 moles of require= 4 moles of
Thus 0.15 moles of will require= of
Thus is the limiting reagent as it limits the formation of product and is the excess reagent.
b) As 9 moles of give = 8 moles of
Thus 0.15 moles of give = of
Mass of
c) As 9 moles of give = 3 moles of
Thus 0.15 moles of give = of
Mass of
CH3OH (l)
Methanol.
This an alcohol, in ambient temperature is liquid, and in contact with water, they dissolve.
HC2H3O2 (l)
Acetic Acid.
This is a liquid acid, common in vinegar, giving them it's taste and sour flavor.
With water they do not repel, they can create a solution.
C12H22O11 (s)
Sucralose.
This is what we know as a common sugar.
It is a solid that dissolves in water.
.
Answer:
Option A
Explanation:
Addition of too much of solvent will make the solution dilute due to which the crystals will not form. Hence option D is incorrect
On the other hand adding a minimum amount of boiling solvent will give a saturated solution for recrystallization. Hence, option A is incorrect
Addition of cold solvent will lower the rate of formation of crystals. Hence, both option B and C are incorrect
The half life of uranium- 238 is
4.46 x10^9 years
Explanation
Half life is the time taken for the radioactivity of a isotope to fall to half its original value.
The original mass of uranium-238 is 4.0 mg
Half of original mass of uranium = 4.0 mg /2 = 2.0 mg
since it take 4.46 x 10^ 9 years for the sample to half the half life of uranium -238 = 4.46 x10^9 years