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3 years ago

Select the correct coefficients to balance the reaction given below. Al + _O₂ → ____ Al₂ O₃

Chemistry

1 answer:

Gnesinka [82]3 years ago

6 0

Answer:

4Al+3O2→2Al2O3

Explanation:

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3 years ago

A sample of a compound is decomposed in the laboratory and produces 330 g carbon, 69.5 g hydrogen, and 220.2 g oxygen. Calculate

Zarrin [17]

Answer: Empirical formula is $C_2H_5O$

Explanation: We are given the masses of elements present in a sample of compound. To evaluate empirical formula, we will be following some steps.

Step 1 : Converting each of the given masses into their moles by dividing them by Molar masses.

$Moles=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of Carbon = 12.0 g/mol

Molar mass of Hydrogen = 1.0 g/mol

Molar mass of Oxygen = 16.0 g/mol

Moles of Carbon = $\frac{330g}{12g/mol}=27.5moles$

Moles of Hydrogen = $\frac{69.5g}{1g/mol}=69.5moles$

Moles of Oxygen = $\frac{220.2g}{16g/mol}=13.76moles$

Step 2: Dividing each mole value by the smallest number of moles calculated above and rounding it off to the nearest whole number value

Smallest number of moles = 13.76 moles

$\text{Mole ratio of Carbon}=\frac{27.5moles}{13.76moles}=1.99\approx 2$

$\text{Mole ratio of Hydrogen}=\frac{69.5moles}{13.76moles}=5.05\approx 5$

$\text{Mole ratio of Oxygen}=\frac{13.76moles}{13.76moles}=1$

Step 3: Now, the moles ratio of the elements are represented by the subscripts in the empirical formula

Empirical formula becomes = $C_2H_5O$

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3 years ago

I have tried the answer 3.9149 and 3.914, it is incorrect

Alja [10]

Answer:

Yea pretty much it's 3.49

Explanation:

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3 years ago

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Aloiza [94]

Answer:

The attraction of the soil to the inside of the surfactant micelle helps loosen the soil from its surface. Once the soil lifts off the surface, it becomes suspended in the water in the micelle. This suspension is also known as emulsification of one liquid into another.

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3 years ago

What is activation energy

ANTONII [103]

Answer:

the minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction.

Explanation:

7 0

3 years ago

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Select the correct coefficients to balance the reaction given below. __Al + ___O₂ → ____ Al₂ O₃

Select the correct coefficients to balance the reaction given below. Al + _O₂ → ____ Al₂ O₃