The Mole & the Avogadro Constant
1. This question has 2 part(s).
1.1. Extended Only
When copper(II) oxide is heated at 800 °C it undergoes the reaction shown by the equation.
4CuO → 2Cu2O + O2
Calculate the volume of oxygen, measured at r.t.p., which is formed when 1.60 g of CuO reacts as shown in the equation.
1.2. Separate: Chemistry and Extended Only
Oxygen is produced by the decomposition of hydrogen peroxide. Manganese(IV) oxide is the catalyst for this reaction. The equation for the decomposition of hydrogen peroxide is shown.
2H2O2 (aq) → 2H2O (l) + O2 (g)
25.0 cm3 of aqueous hydrogen peroxide forms 48.0 cm3 of oxygen at room temperature and pressure (r.t.p.). Calculate the concentration of aqueous hydrogen peroxide at the start of the experiment using the following steps.
Calculate the number of moles of oxygen formed.
Deduce the number of moles of hydrogen peroxide that decomposed.
Calculate the concentration of hydrogen peroxide in mol/dm3.
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
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