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Subject: Chemistry, asked on 13/5/18

Solve this:
Q.3. 2.5 moles of sulphuryl chloride was dissolved in water to produce sulphuric acid and hydrochloric acid. The number of moles of KOH required to completely neutralize the solution is
A 5
B 7
C 8
D 10

Subject: Chemistry, asked on 13/5/18

What is the mole fraction of the solute in 2.5 m aqueous solution?

Subject: Chemistry, asked on 13/5/18

Example 119. What is the molality of a solution of methanol in water in which the mole fraction of methanol is 0.25.

Subject: Chemistry, asked on 13/5/18

Converting one concentration unit into another concentration unit . Calculate molality from molarity Molality is the moles of solute dissolved per 1000 g of the solvent wheareas molarity is the moles of solute per 1000 mL of the solution Molality can be calculated from molarity of this solution as : (a) Calculate the total mass of 1 L (1000 mL ) of solution by using density of the solution (b) Calculate mass of solute from the molarity ( no. of moles ) In 1 L of the solution (c) Calculate the mass of the solvent by subtracting mass of solute from the total mass of solution (d) From the values of moles of solute and mass of solvent calculate molality

Subject: Chemistry, asked on 13/5/18

Solve this:

Subject: Chemistry, asked on 13/5/18

Explain

Subject: Chemistry, asked on 13/5/18

Solve this:

Subject: Chemistry, asked on 13/5/18

Solve this:

Subject: Chemistry, asked on 13/5/18

Solve this:
Question No. 8
The water vapours present in the atmosphere form clouds by the process of
A. condensation
B. evaporation
C. freezing
D. Melting
 

Subject: Chemistry, asked on 13/5/18

Solve this:
Question No. 10
The pressure of 1 mm Hg is equivalent to
A. 101.32 Pa
B. 133.32 Pa
C. 1.01 Pa
D. 1.33 Pa

Subject: Chemistry, asked on 13/5/18

The vapour pressure of pure water and aqueous dilute soilution of ammonia are 25 mm Hg and 20 mm Hg respetively. Calculate the molality of the solution.

Subject: Chemistry, asked on 12/5/18

Sulfur and oxygen form both sulfur dioxide and sulfur trioxide. When samples of these are decomposed, the sulfur dioxide produces 3.49 g oxygen and 3.50 g sulfur, while the sulfur trioxide produces 6.75 g oxygen and 4.50 g sulfur. Calculate the mass of oxygen per gram of sulfur for each sample and show that these results are consistent with the law of multiple proportions.

Subject: Chemistry, asked on 12/5/18

Subject: Chemistry, asked on 12/5/18

Two solutions of H2SO4 of molarities x and y are mixed in the ratio of V1 mL:V2 mL to form a solution of molarity M1. If they are mixed in the ratio of V2 mL: V1 mL they form a solution pf molarity M2. Given (V1/V2)=(x/y)>1 and (M1/M2)=(5/4) then x: y is

Subject: Chemistry, asked on 12/5/18

Mass of a crucible is 15.02g. The mass of this crucible and a solid substance together is 40.086g. If the solid substance occupies a volume of 2.6cm^3. calculate the density of the substance and report the result to the correct number of significant figures.(wrow =9.642g/cm)

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