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LenaWriter [7]
3 years ago
15

How much energy is evolved during the formation of 98.7 g of fe, according to the reaction below? fe2o3(s) + 2 al(s) → al2o3(s)

+ 2 fe(s) δh°rxn = -852 kj?
Chemistry
1 answer:
Sindrei [870]3 years ago
6 0
 The energy that  evolved  during the formation  of 98.7g of Fe is   1505.5 Kj


calculation

find the number of moles of iron = mass/molar mass
molar mass of iron=  55.85 g/mol

moles = 98.7 g /55.85 g/mol = 1.767 moles

energy evolved  is therefore =  852  x 1.767 = 1505.5 Kj
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Explanation:

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The answer is A

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3 years ago
Jeremy bought a new truck for $32,000. The value of the truck after t years can be represented by the formula V = 32,000(.8)t. H
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Hope this Helped!

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4 years ago
determine the volume of your 0.25 m stock solution that is needed to make 200 ml of 0.010 m nacl. show all calculations
rusak2 [61]

The volume of your 0.25 m stock solution that is needed to make 200 ml of 0.010 m NaCl is <u>0.008 L</u>

Concentration is the abundance of a constituent divided by way of the overall volume of an aggregate. several sorts of mathematical descriptions may be outstanding: mass concentration, molar concentration, variety concentration, and extent awareness.

Calculation:-

C₁ =  0.25 M

V₁ = ?

C₂ = 0.010 M

V₂ = 200 ml = 0.2 L

V₁ = C₂V₂/C₁

    = 0.010 ×  0.2 /  0.25

   =<u> 0.008 L</u>

The concentration of a substance is the quantity of solute found in a given amount of solution. Concentrations are normally expressed in terms of molarity, defined because of the variety of moles of solute in 1 L of answer.

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Learn more about concentration here:-brainly.com/question/26255204

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1 year ago
What is the molar mass of Ca(NO3)2?
Valentin [98]
The answer to the molar mass of Ca(NO3)2 is gonna be C. 164.1 g/mol



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3 years ago
Read 2 more answers
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