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IrinaVladis [17]
3 years ago
7

Consider again the thermite reaction. If 0.0257 g Al react completely, what mass of Fe forms? Use the periodic table to find mol

ar masses. Fe2O3 + 2Al → Al2O3 + 2Fe Select the correct setup for this calculation.
Chemistry
2 answers:
Delicious77 [7]3 years ago
8 0

Answer:

is C/ the 3rd one

Explanation:

because i answered it

maxonik [38]3 years ago
6 0

 The mass  of  Fe that  is formed  is 0.0532 grams

 <u><em> Explanation</em></u>

Fe2O3  + 2 Al → Al2O3  + 2 Fe

Step 1: find the moles of Al

   moles  =  mass/molar mass

from periodic table  the molar mass of Al= 27 g/mol

 moles = 0.0257g /27 g/mol =9.5 x10^-4  moles  of Al


Step 2:  <em> use the mole ratio  to  determine the moles of Fe</em>

 the  moles ratio of Al:Fe   is 2:2= 1:1

therefore  the moles of Fe is also =  9.5 x10 ^-4 moles


Step 3: <em> find the mass of Fe</em>

mass= moles  x molar mass of Fe

from periodic table the molar  mass of Fe=  56 g/mol

mass= 9.5 x10 ^-4 moles  x 56 g/mol =0.0532  grams


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The equilibrium constant, Kp, has a value of 6.5 × 104 at 308 K for the reaction of nitrogen monoxide with chlorine. 2NO(g) + C
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At 298K, the equilibrium constant for the following reaction is 4.20×10-7: H2CO3(aq) + H2O H3O+(aq) + HCO3-(aq) The equilibrium
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Answer:

The correct answer is 2.016 x 10⁻¹⁷

Explanation:

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If we add equations (1) and (2) we obtain the the desired equation. Remember that when we add chemical equations, the global equilibrium constant is the product of the constants.

H₂CO₃(aq) + H₂O ⇒ H₃O⁺(aq) + <em><u>HCO₃⁻(aq)</u></em>     K₁= 4.20×10⁻⁷

+

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