Blake Henderson
New Member
- Joined
- Jan 31, 2014
- Messages
- 23
- Gender
- Male
- HSC
- 2015
A) If an aquarium tank holds 70 litres of water, calculate how much heat energy would be required to heat the tank from 18.2 degrees celcius to 26.5 degrees celcius. Note the density of water is known to be 1g/mL.
B) sucrose is a covalent molecular compound that dissolves in water to produce a solution that does not conduct electricity. Hydrogen chloride is also a covalent molecular compound that dissolves in water to producr a solution that does conduct electricity. Explain why this occurs.
C) with reference to molecular forces, explain why more energy is required to produce hydrogen from water than to produce steam frlm water.
D) you have performed a first-hand investigation of the reactions of a range of metals with dilute acie. Choose a metal which reacts more slowly than magnesium but more rapidly than lead to answer following questions: A) describe youe procedure and the observations you made. B) identify the products of the reaction, by name and formula.
E) potassium has electron configuration of 2,8,8,1 and sulfur has the electron configuration 2,8,6
a) write half equations for each, showing how the ions of each of the elements are formed.
b) identify the product formed when potassium reacts with sulfur to form an ionic compound and write its formula
c) predict the formula for the compound formed between sulfur and oxygen ans identify the bonding present in the compound
F) write balanced equations, showing states, for:
a) phosphorus (s) burns in air to produce a white powder, diphosphorus trioxide
b) dilute sulfuric acid causes insoluble copper carbonate to dissolve, forming copper sulfate and carbon dioxide gas and water.
Need simple and quick answers urgently
B) sucrose is a covalent molecular compound that dissolves in water to produce a solution that does not conduct electricity. Hydrogen chloride is also a covalent molecular compound that dissolves in water to producr a solution that does conduct electricity. Explain why this occurs.
C) with reference to molecular forces, explain why more energy is required to produce hydrogen from water than to produce steam frlm water.
D) you have performed a first-hand investigation of the reactions of a range of metals with dilute acie. Choose a metal which reacts more slowly than magnesium but more rapidly than lead to answer following questions: A) describe youe procedure and the observations you made. B) identify the products of the reaction, by name and formula.
E) potassium has electron configuration of 2,8,8,1 and sulfur has the electron configuration 2,8,6
a) write half equations for each, showing how the ions of each of the elements are formed.
b) identify the product formed when potassium reacts with sulfur to form an ionic compound and write its formula
c) predict the formula for the compound formed between sulfur and oxygen ans identify the bonding present in the compound
F) write balanced equations, showing states, for:
a) phosphorus (s) burns in air to produce a white powder, diphosphorus trioxide
b) dilute sulfuric acid causes insoluble copper carbonate to dissolve, forming copper sulfate and carbon dioxide gas and water.
Need simple and quick answers urgently