Chemistry Answers

(a) Draw the Lewis structures for each of the following: (i) NaOH (ii) NH4Cl (iii) CHCl3 [6 marks] (b) State the ground state electronic configurations of magnesium (Mg) atom and the chloride anion (Cl- ) [2 marks]

2AgNO3+Ni→Ni(NO3)2+2Ag

What would happen to a person's mass if the composition of isotopes on earth changed?

When burning magnesium is lowered into a gas jar containing nitrogen 1 oxide it continues to burn forming a white solid

Consider the information above on the combustion of acetone. Solve

the following problem involving the Enthalpy of Chemical Reactions. Show your

solutions. You may refer to the lecture notes for sample problems.

Calculate the amount of heat released during the combustion of

a. 0.75 mole of C3H6O

b. 120g of C3H6O

2.) Calculate ΔG⁰ for a reaction where ΔH⁰ is equal to 36.2 kJ and ΔS⁰ is equal to 123 J/K at 298 K. Is this a spontaneous reaction?

a solution of 3.80 g of CH3COOH in 80.0 g C6H6 has a freezing point of 3.50°C. calculate molar mass of the solute (CH3COOH). the normal freezing point of pure benzene is 5.50°C

1. What is the relationship between the Ksp expressions for a chemical reaction and its reverse chemical reaction?

1. Under what conditions is Keq = KP?

a.      Cisplatin or Platinol has a chemical PtCl2(NH3)2 that is used in the treatment of certain cancers. Calculate (a) the amount (mol) of compound in 285.3 g of cisplatin; (b) the number of hydrogen atoms in 0.98 mol of cisplatin.