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Bingel [31]
2 years ago
15

A compound contains 69.94 percent iron and 30.06 percent oxygen. What is its molecular formula if the molar mass of the compound

is 199.55 grams per mole?
Chemistry
2 answers:
m_a_m_a [10]2 years ago
5 0

Answer:

The molecular formula is Fe₂O₃

Explanation:

The molar mass of the compound is 199.55 g/mol; this means that if we have 1 mol of the compound, we'd have 199.55 g, we'd also have:

  • 199.55 * 69.96/100 = 139.57 g of iron
  • 199.55 * 30.06/100 = 59.98 g of oxygen

Now we <u>calculate the moles of each </u><u><em>element</em></u><u> </u>present in the given masses, using their atomic masses:

  • 139.57 g Fe ÷ 55.84 g/mol = 2.50 mol Fe
  • 59.98 g O ÷ 16 g/mol = 3.75 mol O

Then in 1 mol of the compound, there's 2.50 mol Fe and 3.75 mol O:

  • Fe₂.₅O₃.₇₅

We convert the coefficients into integers (Divide them by the lowest number among them and multiply them by two):

  • Fe₂O₃
NNADVOKAT [17]2 years ago
4 0
For the answer to the question above, it is Fe2O3. The chemical name for Fe2O3 is iron (III) oxide, which is also called ferric oxide. It <span>is an inorganic compound containing a central oxygen atom with two iron atoms attached by single ionic bonds.</span>
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Answer:

1) Conversion of glucose to glucose 6-phosphate by hexokinase

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Explanation:

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Kryger [21]

Explanation:

As the given reaction is as follows.

     H_{2}S(aq) + Cl_{2}(aq) \rightarrow S(s) + 2H^{+}(aq) + 2Cl^{-}(aq)

So, according to the balanced equation, it can be seen that rate of formation of Cl^{-} will be twice the rate of disappearance of H_{2}S .

And, it is known that rate of disappearance of reactant will be negative and rate of formation of products will be positive value.

This means that,

Rate of the reaction = -Rate of disappearance of H_{2}S

                 = k[H_{2}S][Cl_{2}]

                 = (3.5 \times 10^{-2}) \times (2 \times 10^{-4}) \times (2.8 x 10^{-2})

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Therefore, calculate the rate of formation of Cl^{-} as follows.

Rate of formation of Cl^{-} = 2 \times 1.96 \times 10^{-7}

                                        = 3.92 \times 10^{-7} M/s

Thus, we can conclude that the rate of formation of Cl^{-} is 3.92 \times 10^{-7} M/s.

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The human body can get energy by metabolizing proteins, carbohydrates or fatty acids, depending on the circumstances. Roughly sp
Ede4ka [16]

Answer:

3:1

Explanation:

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Since the energy content of food is roughly proportional to the carbon content. It means:

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