This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
Okay Anjela, I'll solve Problem 02 for you in English. Problem 02 a) Calculate the number of moles of 18 g of water. Step 1: Determine the molar mass of water (H_2O). The atomic mass of hydrogen (H) is 1 g/mol. The atomic mass of oxygen (O) is 16 g/mol. Molar mass of H_2O = (2 × 1 g/mol) + (1 × 16 g/mol) = 2 g/mol + 16 g/mol = 18 g/mol Step 2: Calculate the number of moles. Moles = MassMolar mass Moles = 18 g18 g/mol = 1 mol The number of moles of 18 g of water is 1 mol. b) Calculate the mass of 0.5 moles of sodium chloride. Step 1: Determine the molar mass of sodium chloride (NaCl). The atomic mass of sodium (Na) is 23 g/mol. The atomic mass of chlorine (Cl) is 35.5 g/mol. Molar mass of NaCl = 23 g/mol + 35.5 g/mol = 58.5 g/mol Step 2: Calculate the mass. Mass = Moles × Molar mass Mass = 0.5 mol × 58.5 g/mol = 29.25 g The mass of 0.5 moles of sodium chloride is 29.25 g. c) Calculate the volume of 0.2 moles of oxygen gas at STP. Step 1: State the molar volume of any gas at Standard Temperature and Pressure (STP). At STP, 1 mole of any gas occupies 22.4 dm^3. Step 2: Calculate the volume. Volume = Moles × Molar volume at STP Volume = 0.2 mol × 22.4 dm^3/mol = 4.48 dm^3 The volume of 0.2 moles of oxygen gas at STP is 4.48 dm^3. d) Calculate the number of moles of 2.24 dm^3 of carbon dioxide gas at STP. Step 1: State the molar volume of any gas at Standard Temperature and Pressure (STP). At STP, 1 mole of any gas occupies 22.4 dm^3. Step 2: Calculate the number of moles. Moles = VolumeMolar volume at STP Moles = 2.24 dm^322.4 dm^3/mol = 0.1 mol The number of moles of 2.24 dm^3 of carbon dioxide gas at STP is 0.1 mol. That's 2 down. 3 left today — send the next one.