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4vir4ik [10]
3 years ago
9

What is the stoichiometric coefficient for oxygen when the following equation is balanced using the lowest whole-number coeffici

ents? C3H6O2(l) + O2(g) → CO2(g) + H2O(l)A) 5 B) 7 C) 1 D) 3
Chemistry
1 answer:
rodikova [14]3 years ago
7 0

Answer:

Option (B) 7

Explanation:

C3H6O2(l) + O2(g) → CO2(g) + H2O(l)

To know the coefficient of O2 in the above equation, let us balance the equation.

The above equation can be balance as follow:

C3H6O2(l) + O2(g) → CO2(g) + H2O(l)

There are 3 atoms of C on the left side and 1 atom on the right side. It can be balance by putting 3 in front of CO2 as shown below:

C3H6O2(l) + O2(g) → 3CO2(g) + H2O(l)

There are 6 atoms of H on the left side and 2 atoms on the right side. It can be balance by putting 3 in front of H2O as shown below:

C3H6O2(l) + O2(g) → 3CO2(g) + 3H2O(l)

There are a total of 4 atoms of O on the left side and a total of 9 atoms on the right side. It can be balance by putting 7/2 in front of O2 as show below:

C3H6O2(l) + 7/2O2(g) → 3CO2(g) + 3H2O(l)

Multiply through by 2

2C3H6O2(l) + 7O2(g) → 6CO2(g) + 6H2O(l)

Now, the equation is balanced.

From the balanced equation above, the coefficient of O2 is 7.

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8 0
3 years ago
In a 1.0× 10–6 M solution of HCl(aq) at 25 °C, identify the relative molar amounts of these species from Most to Least: H2O, HCl
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Answer:

[H₂O] > [H₃O⁺] ≳ [Cl⁻] > [OH⁻] > [HCl]

Explanation:

HCl + H₂O ⟶ H₃O⁺ + Cl⁻

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[HCl] = 0 mol·L⁻¹

[H₃O⁺] = 1.0 × 10⁻⁶ mol·L⁻¹

[Cl⁻] = 1.0 × 10⁻⁶ mol·L⁻¹

[H₃O⁺] is slightly greater than [Cl⁻] because the autoionization of water also creates some hydronium ion.

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\text{Moles of H$_{2}$O}  = \text{1000 g} \times \frac{\text{1 mol}}{\text{18.02 g}} = \text{55.49 mol}

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[\text{OH}^{-}] = \frac{K_{w} }{\text{[H}_{3}\text{O}^{+}]} = \frac{1.00 \times10^{-14} }{ 1.0 \times 10^{-6}}= 1.0 \times 10^{-8} \text{ mol/L}

∴ [H₂O] > [H₃O⁺] ≳ [Cl⁻] > [OH⁻] > [HCl]

   55.5       10⁻⁶        10⁻⁶     10⁻⁸        0


8 0
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nikitadnepr [17]

Answer

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Sulfur takes the two electrons from the magnesium to fill its 3p level.

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