When zinc metal reacts with sulfur a very powerful reaction takes place with the evolution of a great deal of heat. A chemcial reaction that produces heat energy is said to be exothermic. The reaction takes place according to the equation below.

8Zn_(s) + S_8(s) => 8ZnS_(s)

What is present before the reaction proceeds? a mixture of elements a mixture of compounds a mixture of elements and compounds a compound only an element only

What is present after the reaction is complete? a mixture of elements a mixture of compounds a mixture of elements and compounds a compound only an element only

Identify the elements and compounds present before the reaction proceeds the compound zinc and the element sulfur the element zinc and the compound sulfur the elements sulfur and zinc

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When aluminium metal reacts with iodine, a very powerful reaction takes place with the evolution of a great deal of heat. The reaction takes place according to the equation below

2Al_(s) + 3I_2(s) => All_3(s)

What is present before the reaction proceeds? a mixture of elements a mixture of compounds a mixture of elements and compounds a compound only an element only

What is present after the reaction is complete? a mixture of elements a mixture of compounds a mixture of elements and compounds a compound only an element only

Identify the elements and compounds present before the reaction proceeds the compound aluminium and the element iodine the element aluminium and the compound iodine the elements aluminium and iodine

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When hydrogen peroxide decomposes into oxygen gas and water, a very fast reaction takes place with the evolution of heat. The reaction takes place according to the equation below

2H₂O_2(l) => O_2(g) + 2H₂O_(l)

What is present before the reaction proceeds? a mixture of elements a mixture of compounds a mixture of elements and compounds a compound only an element only

What is present after the reaction is complete? a mixture of elements a mixture of compounds a mixture of elements and compounds a compound only an element only

Identify the elements and compounds present before the reaction proceeds the compound hydrogen peroxide the element hydrogen peroxide the element oxygen gas and hydrogen gas.

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Sulfuric acid dehydrates sugar according to the following equation

C₆H₁₂O_6(s) => 6C_(s) + 6H₂O_(l)

What is present before the reaction proceeds? a mixture of elements a mixture of compounds a mixture of elements and compounds a compound only an element only

What is present after the reaction is complete? a mixture of elements a mixture of compounds a mixture of an element and a compound a compound only an element only

Identify the elements and compounds present before the reaction proceeds the compound hydrogen peroxide the element hydrogen peroxide the element oxygen gas and hydrogen gas. the compound sugar

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Sugar is used as a fuel and reacts vigorously when mixed with an oxidant. Sugar reacts with potassium chlorate according to the equation below.

C₁₂H₂₂O_11(s) + 8KClO_3(s) => 12CO_2(g) + 11H₂O_(g) + 8KCl_(s)

What is present before the reaction proceeds? a mixture of elements a mixture of compounds a mixture of elements and compounds a compound only an element only

What is present after the reaction is complete? a mixture of elements a mixture of compounds a mixture of an element and a compound a compound only an element only

Identify the elements and compounds present before the reaction proceeds the compounds sugar and potassium chlorate the elements carbon dioxide and water the element oxygen gas and hydrogen gas. the compound sugar only

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Aluminium metal reacts with iron oxide to produce aluminium oxide and iron.

2Al_(s) + Fe₂O_3(s) => 2Fe_(s) + Al₂O_3(s)

What is present before the reaction proceeds? a mixture of elements a mixture of compounds a mixture of elements and compounds a compound only an element only

What is present after the reaction is complete? a mixture of elements a mixture of compounds a mixture of an element and a compound a compound only an element only

Identify the elements and compounds present before the reaction proceeds the compound hydrogen peroxide the element hydrogen peroxide the element oxygen gas and hydrogen gas. the compound iron oxide and the element aluminium

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