m (SO2) = 6.4 g.
Let’s determine the volume and number of molecules. We write down the solution.
First, we find the amount of sulfur oxide substance.
n = m / M.
M (SO2) = 32 + 16 * 2 = 64 g / mol.
n = 6.4 g / 64 g / mol = 0.1 mol.
Next, we find the number of molecules, for this we use the following formula.
N = n * Na.
Na – Avogardo’s number, constant equal to 6.02 * 10’23 molecules.
N = 0.1 mol * 6.02 * 10’23 = 6.02 * 10’22 molecules.
Next, we find the volume of the substance.
n = V / Vm.
V = n * Vm.
V = 0.1 mol * 22.4 L / mol = 2.24 L.
Answer: N = 6.02 * 10’22 molecules. V = 2.24 liters.
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