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A gas starts out with a volume of 516ml at a pressure of 345 torr. If the volume decreases to ml, but the temp doesn’t change, what is the new pressure?
The boiling point of an aqueous solution is 102.5°C. What is the freezing point of the solution?
A solution of propylene glycol (antifreeze) in the car's radiator has a freezing point of -20°C. What is the molality of the solution?
Arrange the following according to increasing freezing point:
1m NaCl, 1m CaCl2, 1m C6H12O6, 1m AlCl3
Explain your answer.
What is the net average charge on the predominant form of lysine at Phil values of 2.0, 5.0, and 7.0
Write processes which occur on inert electrodes during electrolysis of FeCl3 and Ca(No3)2 acqueos solution
Phosphorous acid (H3PO3) can be prepared from phosphorus triiodide (PI3) according to the reaction:
〖PI〗_3 (s)+ H_2 O (l)→H_3 〖PO〗_3 (aq)+HI (g)
Balance the equation. If 150 grams of 〖PI〗_3 (MM = 411.7 g/mol) is added to 250 mL of H2O (MM = 18.01 g/mol, ρ=1.00 g/mL), identify the limiting and excess reagents. How many grams of H3PO3 (MM = 81.99 g/mol) will be theoretically produced?
2.83g of a sample of haematite iron ore [iron (III) oxide,Fe2O3] were dissolved in
of iron(II) ions.This solution of iron(II) ions required26.4cm3
concentrated hydrochloric acid and the solution diluted to250cm3
was reduced with tin(II) chloride (which is oxidised to Sn4+in the process) to form a solution
potassium
of a0.0200mol/dm3
.25.0cm3of this solution
dichromate(VI) solution for complete oxidation back to iron(III) ions.
Answer the following questions based on YOUR OWN UNDERSTANDING. Please do not copy paste:(
1. The greater the molar heat of vaporization of a liquid, the greater its vapor pressure. Is this true or not? Explain why or why not.
2. As a liquid is heated at constant pressure, its temperature rises. This trend continues until the boiling point of the liquid is reached. No further rise in the temperature of the liquid can be induced by heating. Explain.
3. Why is molar heat of fusion lower than molar heat of vaporization?
Classify the crystalline forms of these substances as ionic crystals, covalent crystals, molecular crystals, or metallic crystals.
1. CO2
2. B
3. S8
4. KBr
5. Mg
6. SiO2
7. LiCl
8. Cr
9. Sr
10. MgCl2
