Bismuth oxide reacts with carbon to form bismuth metal: bi2o3(s) + 3c(s) → 2bi(s) + 3co(g) when 689 g of bi2o3 reacts with exces
s carbon, (a) how many moles of bi form? 2.957 mol bi (b) how many grams of co form? g co
2 answers:
CO mass = 4,435. 18 = 79,839 grams
Stokiometry in Chemistry learns about chemical reactions mainly emphasizing quantitative, such as calculation of volume, mass, number, which is related to the number of ions, molecules, elements etc.
In chemical calculations, the reaction can be determined, the number of substances that can be expressed in units of mass, volume, mole, or determine a chemical formula, for example the substance level or molecular formula of hydrate.
In stockiometry therein includes
relative atomic mass (Ar) and relative molecular mass (Mr)
Mr. AxBy = (x.Ar A + y. Ar B)
Reactions that occur:
Bi₂O₃ (s) + 3C (s) → 2Bi (s) + 3CO (g)
- We specify mole Bi₂O₃
Mr Bi₂O₃ = 2. ar bi + 3. Ar O
Mr Bi₂O₃ = 2. 209 + 3. 16
Mr. Bi₂O₃= 466
mole Bi₂O₃ = gram / Mr
mole = 689/466
mole 1.4785
- A. Comparison of Bi reaction coefficients: Bi₂O₃ = 1: 2, then Bi moles = 2. 1,4785 = 2, 957
Comparison of Bi reaction coefficients: Bi₂O₃ = 1: 2,
- B. While the number of moles CO = 3 x 1.4785 = 4,435
Mr. CO = 12 + 16 = 18
mass CO = mole. Mr
CO mass = 4,435. 18 = 79,839 grams
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Answer: 131 g of bromine is required.
Explanation:
The balanced equation will be :
To calculate the moles, we use the equation:
moles of
According to stoichiometry :
2 moles of require = 3 moles of
Thus 0.544 moles of require=
of
Mass of
Thus 131 g of bromine is required.