JEE Mains · Chemistry · STD 11 - 1. Some basic concept of chemistry
When 81.0 g of aluminium is allowed to react with 128.0 g of oxygen gas, the mass of aluminium oxide produced in grams is_______ - (Nearest integer)
Given :
Molar mass of Al is \(27.0 \mathrm{~g} \mathrm{~mol}^{-1}\)
Molar mass of O is \(16.0 \mathrm{~g} \mathrm{~mol}^{-1}\)
- A 150
- B 153
- C 145
- D 140
Answer & Solution
Correct Answer
(B) 153
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & 4 \mathrm{Al}+3 \mathrm{O}_2 \longrightarrow 2 \mathrm{Al}_2 \mathrm{O}_3 \\ & \frac{81}{27}=3 \text { mole } \frac{128}{32}=4 \mathrm{~mole}\end{aligned}\) Limiting reagent…
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