Chemistry Answers

A vessel of volume 5 liters was filled with 2 moles of hydrogen gas (a), then a further

1 mole of chlorine gas (b), and then the mixture was sparked leading to the formation of 1 mole of HCI (g) (c). What are the partial pressure of the components

and the total pressure of the system at the final stage. The temperature being 25°C throughout.

How many grams of solute is present in 0.4 moles Magnesium hydroxide, Mg(OH)₂ in 550 g water, H₂O? The molar mass of Mg(OH), is 58 g/mol.

.A solution prepared by adding 10g of an unknown non-volatile, non-electrolyte solute to 150 g of water. The Boiling point of the solution is elevated by 0.433 0C above the normal boiling point of the solvent. What is the molar mass of the unknown substance?

Explain the process of steam distillation

A 74.8 g sample of a metal at 143.2 °C is added to an insulated vessel containing

208g of water at 24.8 °C. The final temperature of the mixture is 31.1 °C. What is

the specific heat of the metal in J/g-°C?

How many mL of the titrant Sr(OH)₂ is needed to titrate 4.31 mL of 0.75 M HClO₄, if the molarity of the titrant is 0.65 M?

1. What makes network solids unique compared to other solids?

2. What is the importance of network solids in modern times? Explain your answer.

Study carefully each of the item and do what is

asked.

1. List the types of intermolecular forces that exist between molecules in each of

the following species: (a) benzene (C6H6), (b) CH3Cl, (c) PF3, (d) NaCl, (e) CS2.

2. Which of the following can form hydrogen bonds with water? CH3OCH3, CH4,

F,HCOOH, Na+

3. Which of the following species are capable of hydrogen-bonding among

themselves? (a) C2H6, (b) HI, (c) KF, (d) BeH2, (e) CH3COOH

4. Arrange the following in order of increasing boiling point: RbF, CO2, CH3OH,

CH3Br.

5. Which member of each of the following pairs of substances would you expect

to have a higher boiling point? (a) O2 and Cl2, (b) SO2 and CO2, (c) HF and HI

At 50°C, the vapor pressure of ethanol is 0.30 atm, acetic acid

is 0.08 atm, water is 0.12 atm, and acetone is 0.84 atm. Arrange these substances in

order of increasing manner:

1. rates of evaporation.

2. boiling point temperature.

3. vapor pressure.

4. viscosity.

5. intermolecular forces.

Using conversion method. Calculate the molality and molarity of aqueous phosphoric acid solution 1.88 g/ml containing 20% by mass of H3PO4