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.
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Here are the solutions to the questions: 1. Molar mass is the mass of The molar mass of a substance is defined as the mass of one mole of that substance. B) one mole of a substance 2. The mass number of an atom is the sum of the number of The mass number of an atom represents the total number of protons and neutrons in its nucleus. A) protons and neutrons in the nucleus of an atom 3. Why are some ionic compounds like AgCl insoluble in water which is a polar solvent? For an ionic compound to dissolve in water, the energy released when the ions are solvated (solvation energy or hydration energy) must be sufficient to overcome the energy required to break apart the ionic lattice (lattice energy). If the lattice energy is significantly higher than the solvation energy, the compound will be insoluble. A) Their lattice energy is higher than their solvation energy 4. The mass of 1 mole of calcium is 40 g. What is the mass of one calcium atom? Step 1: Identify the given molar mass and Avogadro's number. The molar mass of calcium is 40 g/mol. Avogadro's number is 6.022 × 10^23 atoms/mol. Step 2: Calculate the mass of one calcium atom. The mass of one atom is the molar mass divided by Avogadro's number. Mass of one atom = Molar massAvogadro's number Mass of one atom = 40 g/mol6.022 × 10^23 atoms/mol Mass of one atom ≈ 6.642 × 10^-23 g/atom Step 3: Select the closest option. The calculated value is approximately 6.642 × 10^-23 g. C) 6.65 × 10^-23 Send me the next one 📸