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2 years ago

What is the reduction half-reaction for the reaction of zinc with hydrochloric acid?

1 answer:

german2 years ago

6 0

2HCl (aq) + Zn²⁺ ⇒ ZnCl₂ + 2H⁺ Total Reaction

Leo goes Ger (Lose electron oxidize, Gain electron reduction)

Zn²⁺ + 2e⁻ ⇒ Zn Oxidation half-reaction

2H ⇒ 2H⁺ + 2e⁻ Reduction half-reaction

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What mass of CO is needed to react completely with55.0 g of Fe2O3(s)+CO(g) yield Fe(s)+CO2(g)?

Katarina [22]

Answer:

28.9 g

Explanation:

We know that we will need a balanced equation with masses, moles, and molar masses of the compounds involved.

<em>Gather all the information in one place</em> with molar masses above the formulas and masses below them.

$M_{r}$ : 159.69 28.01

Fe₂O₃ + 3CO ⟶ 2Fe + 3CO₂

Mass/g: 55.0

1. Use the molar mass of Fe₂O₃ to calculate the moles of Fe₂O₃.

$\text{Moles of Fe$_{2}$O$_{3}$} =\text{55.0 g Fe$_{2}$O$_{3}$} \times \frac{\text{1 mol Fe$_{2}$O$_{3}$}}{\text{159.69 g Fe$_{2}$O$_{3}$}}= \text{0.3444 mol Fe$_{2}$O$_{3}$}$

2. Use the molar ratio of CO:Fe₂O₃ to calculate the moles of CO.

$\text{Moles of CO} = \text{0.3444 mol Fe$_{2}$O$_{3}$} \times \frac{\text{3 mol CO}}{\text{1 mol Fe$_{2}$O$_{3}$}}= \text{1.033 mol CO}$

3.Use the molar mass of CO to calculate the mass of CO.

$\text{Mass of CO} = \text{1.033 mol CO} \times \frac{\text{28.01 g CO} }{\text{1 mol CO}}= \textbf{28.9 g CO}$

3 0

2 years ago

Read 2 more answers

What is the most basic level of biological organization?

Brums [2.3K]

Answer:

molecule

Explanation:

5 0

2 years ago

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Glven 4.62 mol of sodium hydroxide, NaOH, how many grams are present?

Vaselesa [24]

1 mole is equal to 1 moles NaOH, or 39.99711 grams.
Hope this helped

3 0

2 years ago

The mass number for an atom is numerically equal to which quantity

Misha Larkins [42]

Answer:

The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in an atom is its mass number minus its atomic number.

Explanation:

protons

The mass number of an atom is its total number of protons and neutrons. Atoms of different elements usually have different mass numbers , but they can be the same. For example, the mass number of argon atoms and calcium atoms can both be 40.

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2 years ago

Write the word and balanced chemical equations for the reaction between:

Greeley [361]

Answer:

HCl + Ca(OH)2 = CaCl2 + H2O - Chemical Equation Balancer.

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2 years ago