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zubka84 [21]
2 years ago
12

Please helpppppppppp

Chemistry
2 answers:
IgorC [24]2 years ago
4 0

Answer:

Plants take carbon dioxide from the air and use it to make food.

Explanation:

kipiarov [429]2 years ago
4 0

the carbon cycle is the process in which carbon travels from the atmosphere into organisms and the earth and then back into the atmosphere

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Calculate the enthalpy change for the thermite reaction: 2al(s)+fe2o3(s)→2fe(s)+al2o3(s), δh∘rxn=−850 kj when 4.00 mol of al und
kolezko [41]

<u>Given:</u>

Enthalpy change ΔH for the thermite reaction = -850 kJ

Moles of Al involved = 4

<u>To determine:</u>

Reaction enthalpy when 4 moles of Al reacts

<u>Explanation:</u>

The thermite reaction is-

2Al(s) + Fe2O3(s) → 2Fe(s) + Al2O3(s)

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therefore, when 4 moles of Al reacts, the change in enthalpy is-

= 4 moles * (-850) kJ/2 moles = -1700 kJ

Ans: Enthalpy change is -1700 kJ


6 0
3 years ago
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