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2 years ago

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Chemistry

1 answer:

Bess [88]2 years ago

8 0

Answer:

4Al + 3O₂ → 2Al₂O₃

Explanation:

4Al + 3O₂ → 2Al₂O₃

Only this reaction above obeys the law of conservation of mass. The others flout the rule.

The law of conservation of mass states that "matter is neither created nor destroyed in a chemical reaction but are simply transformed from one form to another".

By this law, the number of atoms on both sides of expression must be the same;

Number of atoms

Elements Left hand side Right hand side

Al 4 4

O 6 6

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Answer: There are 0.00269 moles of acetic acid in buffer.

Explanation:

To calculate the number of moles for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution in ml}}$ .....(1)

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Putting values in equation 1, we get:

$0.0880M=\frac{\text{Moles of acetic acid}\times 1000}{30.6ml}\\\\\text{Moles of acetic acid}=\frac{0.0880\times 30.6}{1000}=0.00269mol$

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2 years ago

Fe + O2 + H₂O- & Fe2O3 + H₂O. balance por el método de tanteo

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Answer:

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2 years ago

How many atoms total are present in one molecule of 5-methyl-2 hexanol C7H16O

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Answer:

24 atoms

Explanation:

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3 years ago

An oxygen atom has a mass of 2.66 x 10^-23 g and a glass of water has a mass of 0.050kg. Use this information to answer the ques

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<h2>ANSWER OF EACH PART ARE GIVEN BELOW</h2>

Explanation:

We know, each mole contains $N_A=$ $6.023 \times 10^{23}$ atoms.

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Mass of water in glass=0.050 kg = 50 gm.

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