Hydrogen gas is given off when a reactive metal undergoes a single-displacement reaction with water is because the <span>very active metals react with water. For example, calcium reacts with water to form calcium hydroxide and hydrogen gas etc. </span>
<span>Deforestation typically leads to soil erosion and the ruin of the ecosystem where deforestation occurred. The land gets destroyed and with it the natural habitat of the animals and plants who live there. In addition, we, the humans, lose oxygen because of lack of trees.</span>
Answer:

Explanation:
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In this case, according to the given chemical reaction, it possible for us to set up the expression for the calculation of the enthalpy change as shown below:

Thus, given the values of the enthalpies of formation on the attached file, we obtain:
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there are 4.0 moles of SO3
for it to be balanced in this case would be " <em>4</em> C6H6 + <em>6</em> CI2 = <em>3</em> C6H5CI + <em>9</em> HCI" therefore it's be a <u>Double Replacement</u>