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2 years ago

In the compound Al2O3, the ratio of aluminum to oxygen is?

Chemistry

1 answer:

Triss [41]2 years ago

7 0

Answer:

2:3

Explanation:

The compound whose chemical formula is given in the question is called Aluminium oxide. It is structurally made up of two atoms of aluminum (Al) and three atoms of oxygen (O).

Based on the above, the atomic ratio of aluminum to oxygen can be calculated as 2:3 i.e. 2 atoms of aluminum to 3 atoms of oxygen.

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3 years ago

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There are two isotopes of chlorine. below is a list of each and their mass and abundance. calculate the atomic mass of chlorine.

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3 years ago

1 C8H10(l) +21/2O2(g) → 8CO2(g) + 5H2O(g), Hcomb= ? Hf for C8H10(l) = +49.0kJ/mol C8H10(l) Use the balanced combustion reaction

nikklg [1K]

Answer:

$H_{comb}=-4406kJ/mol$

Explanation:

Hello,

In this case, the enthalpy of combustion is understood as the energy released when one mole of fuel, in this case octene, is burned in the presence of oxygen and is computed with the enthalpies of formation of the fuel, carbon dioxide and water as shown below (oxygen is circumvented as it is a pure element):

$H_{comb}=8*\Delta _fH_{CO_2}+5\Delta _fH_{H_2O}-\Delta _fH_{C_8H_{10}}$

Thus, since we already know the enthalpy of combustion of the fuel, for carbon and water we have -393.5 and -241.8 kJ/mol respectively, thereby, the enthalpy of combustion turns out:

$H_{comb}=8*(-393.5kJ/mol)+5(-241.8kJ/mol)-49.0kJ/mol\\\\H_{comb}=-4406kJ/mol$

Best regards.

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3 years ago

How do you balance this chemical equation?

garik1379 [7]

Answer:

i will help hold up

Explanation:

what grade are you in

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Describe a plants circulatory system brainly?

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3 years ago