Problem Solving.docx

1. Hidrogen peroksida terurai berdasarkan persamaan berikut: Hydrogen peroxide decomposes according to the following equation:

2H2O2(ce) → 2H2O(ce) + O2(g) 2H2O2(l) → 2H2O(l) + O2(g) Hitung isi padu gas oksigen, O2 yang boleh terhasil pada STP daripada penguraian 34 g hidrogen peroksida, H2O2. Calculate the volume of oxygen gas, O2 measured at STP that can be obtained from the decomposition of 34 g of hydrogen peroxide, H2O2. [JAR/RAM: H = 1; O = 16; Isi padu molar/Molar volume: 22.4 dm3 mol-1 at STP] 2. Argentum karbonat, Ag2CO3 mudah terurai apabila dipanaskan untuk menghasilkan logam argentum. Silver carbonate, Ag2CO3 breaks down easily when heated to produce silver metal.

2Ag2CO3 → 4Ag + 2CO2 + O2 Hitung jisim argentum karbonat yang diperlukan untuk menghasilkan 10 g argentum. Find the mass of silver carbonate required to produce 10 g of silver. [JAR/RAM: C = 12; O = 16; Ag = 108] 3. 16 g kuprum(II) oksida, CuO bertindak balas dengan metana berlebihan, CH4. 16 g of copper(II) oxide, CuO reacts with excess methane, CH4.

4CuO(p) + CH4(g) → 4Cu(p) + CO2(g) + 2H2O(ce) 4CuO(s) + CH4(g) → 4Cu(s) + CO2(g) + 2H2O(l) Dengan menggunakan persamaan di atas, cari jisim kuprum yang terhasil. Using the above equation, find the mass of copper produced. [JAR/RAM: Cu = 64; O = 16] 4. Seorang murid memanaskan 20 g kalsium karbonat, CaCO3 dengan kuat. Ia terurai mengikut persamaan di bawah: A student heats 20 g of calcium carbonate, CaCO3 strongly. It decomposes according to the equation below:

CaCO3 → CaO + CO2 (a) Jika karbon dioksida yang terhasil dikumpulkan pada keadaan bilik, berapakah jumlah isi padu itu? If the carbon dioxide produced is collected at room conditions, what is its volume? (b) Hitung jisim kalsium oksida, CaO yang terhasil. Calculate the mass of calcium oxide, CaO produced. [JAR/RAM: C = 12; O = 16; Ca = 40. Isi padu molar pada keadaan suhu bilik/Molar volume at room condition: 24 dm3 mol-1]

1. Hidrogen peroksida terurai berdasarkan persamaan berikut: Hydrogen peroxide decomposes according to the following equation:

2H2O2(ce) → 2H2O(ce) + O2(g) 2H2O2(l) → 2H2O(l) + O2(g) Hitung isi padu gas oksigen, O2 yang boleh terhasil pada STP daripada penguraian 34 g hidrogen peroksida, H2O2. Calculate the volume of oxygen gas, O2 measured at STP that can be obtained from the decomposition of 34 g of hydrogen peroxide, H2O2. [JAR/RAM: H = 1; O = 16; Isi padu molar/Molar volume: 22.4 dm3 mol-1 at STP] 2. Argentum karbonat, Ag2CO3 mudah terurai apabila dipanaskan untuk menghasilkan logam argentum. Silver carbonate, Ag2CO3 breaks down easily when heated to produce silver metal.

2Ag2CO3 → 4Ag + 2CO2 + O2 Hitung jisim argentum karbonat yang diperlukan untuk menghasilkan 10 g argentum. Find the mass of silver carbonate required to produce 10 g of silver. [JAR/RAM: C = 12; O = 16; Ag = 108] 3. 16 g kuprum(II) oksida, CuO bertindak balas dengan metana berlebihan, CH4. 16 g of copper(II) oxide, CuO reacts with excess methane, CH4.

4CuO(p) + CH4(g) → 4Cu(p) + CO2(g) + 2H2O(ce) 4CuO(s) + CH4(g) → 4Cu(s) + CO2(g) + 2H2O(l) Dengan menggunakan persamaan di atas, cari jisim kuprum yang terhasil. Using the above equation, find the mass of copper produced. [JAR/RAM: Cu = 64; O = 16] 4. Seorang murid memanaskan 20 g kalsium karbonat, CaCO3 dengan kuat. Ia terurai mengikut persamaan di bawah: A student heats 20 g of calcium carbonate, CaCO3 strongly. It decomposes according to the equation below:

CaCO3 → CaO + CO2 (a) Jika karbon dioksida yang terhasil dikumpulkan pada keadaan bilik, berapakah jumlah isi padu itu? If the carbon dioxide produced is collected at room conditions, what is its volume? (b) Hitung jisim kalsium oksida, CaO yang terhasil. Calculate the mass of calcium oxide, CaO produced. [JAR/RAM: C = 12; O = 16; Ca = 40. Isi padu molar pada keadaan suhu bilik/Molar volume at room condition: 24 dm3 mol-1]