Answer:
Mass of Fe produced = 3.86785211069 ≈ 3.87 kg
Explanation:
From the question the chemical reaction can be written as follow :
Fe2O3 + C → Fe + CO
Balance the equation
Fe2O3 + 3C → 2Fe + 3CO
compute the molecular mass of Fe2O3 and atomic mass of Iron(Fe)
Molecular mass of Fe2O3 = 55.845(2) + 15.999(3) = 111.69 + 47.997 = 159.687 g
Atomic mass of iron = 55.845 g
From the balanced equation
159.687 g of Fe2O3 produces 2 × 55.845 = 111.69 g of Fe(iron)
Convert the 5.53 kg to gram
1 kg = 1000 g
5.53 kg = 5.53 × 1000 = 5530 g
since,
159.687 g of Fe2O3 produces 2 × 55.845 = 111.69 g of Iron(Fe)
5530 g of Fe2O3 will produce
cross multiply
Mass of Fe produced =5530 × 111.69/159.687
Mass of Fe produced = 617645.7
/159.687
Mass of Fe produced = 3867.85211069 g
convert to kg
1000 g = 1 kg
3867.85211069 = 3867.85211069/1000
Mass of Fe produced = 3.86785211069 ≈ 3.87 kg
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Answer:
c. Atoms of two or more elements bond together
Explanation:
a chemical reactions forms products ( new substances); where it rearranges themselves to form new bonds.
Answer: See below
Explanation: a. The mass of an element is composed of:
protons: 1 amu each
neutrons: 1 amu each
electrons: 0 amu each
Only the protons and neutrons are counted in the atomic mass of an element
b. Electrons are assigned a mass of 0. They do have a mass, but it is exceedingly small compared to the protons and neutrons, so they are left out of the calculation of an element's mass.
c. An element becomes unstable if the neutrons exceed the protons by a certain ratio, dependent on the element.
Answer:
1= 2H₂ + O₂ → 2H₂O
2=CaCo₃ + heat → CaO +CO₂
3=CH₄ + 2O₂ → CO₂ +2H₂O
4=HCl + NaOH → NaCl + H₂O
Explanation:
1 = Simple composition
The formation of water molecule is simple composition reaction. In this reaction two hydrogen atoms react with one oxygen atom and form one water molecules.
2H₂ + O₂ → 2H₂O
The amount of energy released is -285.83 KJ/mol. It is exothermic reaction.
2 = Simple decomposition reaction:
The break down of sodium hydrogen carbonate into sodium carbonate, carbondioxide and water is decomposition reaction. The decomposition reactions re mostly endothermic, because compound required energy to break.
2NaHCO₃ + heat → Na₂CO₃ + H₂O + CO₂
It is endothermic reaction.
Another example is:
CaCo₃ + heat → CaO +CO₂
3 = Combustion reaction
Consider the combustion of methane:
CH₄ + 2O₂ → CO₂ +2H₂O
The burning of methane is exothermic. The combustion reactions are exothermic because when fuel are burns they gives energy.
4 = Neutralization reaction
The neutralization reactions are those in which acid and base react to form the salt and the water. Some neutralization reactions are exothermic because they release heat. e.g
Consider the neutralization reaction of HCl and NaOH.
HCl + NaOH → NaCl + H₂O
