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17 Questions View: All Solved Unsolved
25.0mL of 0.05M Ba(OH)2 neutralised 40.0mL of nitric acid. Determine the concentration of the acid.
30 mL of 0.10M NaOH neutralised 25.0mL of hydrochloric acid. Determine the concentration of the acid
A compound was analyzed and found to contain 13.5 g Ca, 10.8 g O, and 0.675 g H. What is the empirical formula of the compound?
Calculate the empirical formula of a compound composed of 38.67 % C, 16.22 % H, and 45.11 %N
What is the empirical formula of a compound that contains 27.3% carbon and 72.7% oxygen by mass?
What is the density of ammonia gas, at STP?
How many moles of Fe are in 5.6 g Fe? How many Fe atoms are contained in the sample?
What type(s) of intermolecular forces exist between the following pairs: (a) HBr and H2S, (b) Cl2 and CBr4
What is the meaning of the term resonance?
Explain the following inter molecular forces in compounds. a)Dipole-dipole forces b)Hydrogen bonding forces.
With a well elaborated diagram illustrate the dative bonding in Ammonium ion.
Define Co-ordinate (dative covalent) bonding
Define covalent bond.
Outline properties of ionic compounds
Consider the reaction of sodium (a Group IA metal) with chlorine (a Group VIIA nonmetal).Show the bonding between the two elements.By drawing the electronic configurations.
Define the following terms. i)Chemical bond. ii)Ionic bonding
Giving examples in each case,give a brief description of the following chemical families. i)Group IA ii)Group IIA iii)Group IIIA iv)Group VIIIA v)f-Transition Elements