<u>Answer:</u> The mass of iron in the ore is 10.9 g
<u>Explanation:</u>
We are given:
Mass of iron (III) oxide = 15.6 g
We know that:
Molar mass of Iron (III) oxide = 159.69 g/mol
Molar mass of iron atom = 55.85 g/mol
As, all the iron in the ore is converted to iron (III) oxide. So, the mass of iron in iron (III) oxide will be equal to the mass of iron present in the ore.
To calculate the mass of iron in given mass of iron (III) oxide, we apply unitary method:
In 159.69 g of iron (III) oxide, mass of iron present is
So, in 15.6 g of iron (III) oxide, mass of iron present will be =
Hence, the mass of iron in the ore is 10.9 g
Answer:
Heat of the reaction per mole of NaOH = 46.02 kJ/mol
Explanation:
The reaction between HCl (strong acid) and NaOH(strong base) is a neutralization reaction which yields a salt NaCl and water
The heat (q) of a reaction is given as:
where m = mass of the system
c = specific heat
T1 and T2 are the initial and final temperatures
It is given that:
Volume of HCl = 500.0 ml
Volume of NaOH = 500.0 ml
Density of HCl and NaOH = 1.000 g/ml
Total mass of the solutions, m = 500.0 +500.0 = 1000.0 g
c = 4.184 J/g/c
T1 = 25.6 C
T2 = 26.70 C
Substituting appropriate values in equation (1) gives:
Now, the number of moles of NaOH is:
Heat of reaction/mole NaOH is:
Basically, since buildings are made from limestone, acids react with the limestone in the building, breaking it down continually to form salt thereby causing in the destruction of the building.ie
CaCO3 + H2SO4
--> CaSO4 + H2CO3
H2CO3 --> CO2 gas + H2O
Answer: Uranium enrichment. Uranium is used to fuel nuclear reactors; however, uranium must be enriched before it can be used as fuel. Enriching uranium increases the amount of uranium-235 (U235) that can sustain the nuclear reaction needed to release energy and produce electricity at a nuclear power plant.