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eduard
2 years ago
5

How many moles of Fe2O3 were used to produce with 11.5 moles of CO2 ?

Chemistry
1 answer:
Inessa [10]2 years ago
7 0

Moles of Fe2O3 used : 3.83

<h3>Further explanation</h3>

Given

11.5 moles of CO2

Required

moles of Fe2O3

Solution

Reaction

<em>Fe2O3 + 3CO ⇒2Fe + 3CO2 </em>

The reaction coefficient shows the mole ratio of the reacting compound (reactants or products)

From the equation, mol ratio of Fe2O3 : CO2 = 1 : 3, so mol Fe2O3 :

= 1/3 x moles CO2

= 1/3 x 11.5

= 3.83 moles

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3 years ago
A measurement 172.54 m rounded to three significant figures is
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2 years ago
An energy of 6.8 x 10^-19 J/atom is required to cause an aluminum atom on a metal surface to lose an electron.
Nana76 [90]

Wavelength of the light is 2.9 × 10⁻⁷ m.

<u>Explanation:</u>

Planck - Einstein equation shows the relationship between the energy of a photon and its frequency, and they are directly proportional to each other and  it is given by the equation as E = hν,

where E is the energy of the photon

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ν is the frequency

From the above equation, we can find the frequency by rearranging the equation as,

ν = $ \frac{E}{h} = $ \frac{6.8 \times 10^{-19}}{6.626\times10^{-34}} = 1.03\times10^{15} s^{-1}

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ν × λ = c

It can be rearranged to get λ as,

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6 0
3 years ago
Calculate the standard cell potential given the following standard reduction potentials: Al3++3e−→Al;E∘=−1.66 V Cu2++2e−→Cu;E∘=0
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Answer:

Explanation:

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Eº cell = Eº oxidation + Eº reduction

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So the species that is going to be oxidized is the Aluminium, and therefore:

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Equally valid is to write the equation as:

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These two expressions are equivalent, choose the one you fell more comfortable but be careful with the signs.

3 0
3 years ago
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6 0
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