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Questions in chemistry

[Done] Using the thermodynamic information in the ALEKS Data tab, calculate the standard reaction free energy of the following chemical reaction: [tex]$TiCl_4(g)+2 H_2 O(g) \rightarrow TiO_2(s)+4 HCl(g)$[/tex] Round your answer to zero decimal places.

[Done] Which of these is an example of a physical property? A. Sodium ignites when placed in water. B. Iron combines with oxygen to rust. C. Sodium metal is soft and malleable.

[Done] Which of the following can easily form an ionic bond with a cation? A. Sr B. Ne C. [tex]$NH _4{ }^{+}$[/tex] D. [tex]$PO _4{ }^{3-}$[/tex]

[Done] Using the thermodynamic information in the ALEKS Data tab, calculate the standard reaction free energy of the following chemical reaction: [tex]$TiCl_4(g)+2 H_2 O(g) \rightarrow TiO_2(s)+4 HCl(g)$[/tex] Round your answer to zero decimal places.

[Done] How many neutrons are in chlorine-35? 18 17 35

[Done] The pH of a solution is: A. a description of the amount of sodium in medicines. B. a general prediction of how long it will take for a substance to cause a stomach ache. C. a measure of how fast it will denature a protein. D. a measure of how much acid it takes to destroy a buffer. E. a measure of the concentration of hydrogen ions it contains.

[Done] Write a complete balanced equation when solid sulphur is (a) burnt in oxygen. (b) heated with iron.

[Done] Identify the type of each of the following reactions, stating the reason for your answers. A. [tex]$Fe _2 O _3+2 Al \rightarrow Al _2 O _3+2 Fe +$[/tex] heat B. [tex]$Pb \left( NO _3\right)_2+2 KI \rightarrow PbI _2(\downarrow)+2 KNO _3$[/tex]

[Done] Identify the type of each of the following reactions, stating the reason for your answers. A. [tex]Fe _2 O _3+2 Al \rightarrow Al _2 O _3+2 Fe +[/tex] heat B. [tex]Pb \left( NO _3\right)_2+2 KI \rightarrow PbI _2(\downarrow)+2 KNO _3[/tex]

[Done] (b) Heated with iron. [tex]Fe_{(s)} + CS_2(g) =\ \textgreater \ FeS_{(s)} + C_{(s)}[/tex] QUESTION 4 Burning magnesium reacts with carbon dioxide to form carbon and a white solid. (i) Write the name of the white solid. (ii) Explain why this reaction is an example of redox (reduction - oxidation) reaction. (iii) Define oxidation in terms of oxidation number.