There are 3 moles of water formed in the complete combustion of ethane.
<h3>What is Combustion Reaction? </h3>
Combustion is a chemical reaction between substances , usually including oxygen and usually accompanied by the generation of heat and light in form of flame.
For example , the wood burning in a fireplace. The wood is a fuel which continuously react with oxygen in the air in a combustion reaction.
When ethane goes for combustion
reaction ,
C2H6+7/2 O2→2CO2+ 3H2O
As you can see on the above reaction 3 moles of water molecules are produced .
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<span>The boiling point would be 35 degrees Celsius. </span>
Answer:
The molar concentration of Fe²⁺ in the original solution is 1.33 molar
Explanation:
Moles of K₂Cr₂O₇ = Molarity x Volume (lit)
= 0.025 x 35.5 x 10⁻³
= 0.0008875
Cr₂O₇²⁻ + 6 Fe²⁺ + 14 H⁺ → 2 Cr³⁺ + 6 Fe³⁺ + 7 H₂O
From equation
1 mole K₂Cr₂O₇ used for the oxidation of 6 moles Fe²
0.0008875 mole K₂Cr₂O₇ used for the oxidation of =
= 0.005325 mole of Fe²
Molarity = 
Molar concentration of Fe² = 
= 1.33 molar
So molar concentration of Fe²⁺ in the original solution = 1.33 molar
From the periodic table:
mass of lithium = 6.941 grams
number of moles = mass / molar mass
number of moles of Li = 0.284 / 6.941 = 0.0409 moles
Molarity can be calculated using the following rule:
molarity = number of moles of solute / liters of solution
volume (in liters) = number of moles of solute / molarity
volume = 0.0409 / 0.362 = 0.1129 liters
