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Convert from moles to molecules or molecules to moles1. How many molecules are in 2.0 moles of hydrogen gas (H2)? 2. How many moles is 2.0 x 1025 particles of silver nitrate? 3. How many atoms of oxygen are in 2.4 x 1023 molecules of copper(II) sulfate?
Convert from moles to molecules or molecules to moles1. How many molecules are in 2.0 moles of hydrogen gas (H2)? 2. How many moles is 2.0 x 1025 particles of silver nitrate? 3. How many atoms of oxygen are in 2.4 x 1023 molecules of copper(II) sulfate?
1. How many molecules are in 2.0 moles of hydrogen gas (H₂)?There are 6.022 * 10^23 particles in one mol of particles. There are 6.022 * 10^23 molecules of a compound in one mol of molecules of that compound.We can compare a mol with a dozen. When we want a dozen eggs, we are asking for 12 eggs. When we say a mol of eggs, we want 6.022 * 10^23 eggs.1 mol of molecules = 6.022 * 10^23 moleculesWe will use that relationship to find the answer to our problem.number of molecules of H₂= 2.0 moles of H₂ * 6.022 * 10^23 molecules of H₂/(1 mol of H₂)number of molecules of H₂ = 1.2 * 10^24 moleculesAnswer: there are 1.2 * 10^24 molecules of hydrogen gas in 2.0 moles of it.2. How many moles is 2.0 x 10^25 particles of silver nitrate (AgNO₃)?1 mol of molecules = 6.022 * 10^23 moleculesnumber of moles of AgNO₃ = 2.0 x 10^25 molecules/(6.022 * 10^23 molecules/mol)number of moles of AgNO₃ = 33 molesAnswer: there are 33 moles in 2.0 x 10^25 particles of silver nitrate.3. How many atoms of oxygen are in 2.4 x 10^23 molecules of copper(II) sulfate (CuSO₄)?The formula of copper (II) sulfate is CuSO₄. So, one molecule of CuSO₄ has 4 atoms of O.1 molecule of CuSO₄ = 4 atoms of OWe will that relationship to find the answer to our problem.number of atoms of O = 2.4 * 10^23 molecules of CuSO₄ * 4 atoms of O/(1 molecule of CuSO₄)number of atoms of O = 9.6 * 10^23 atomsAnswer: there are 9.6 * 10^23 atoms in2.4 * 10^23 molecules of CuSO₄....