Density is an important physical property. Density is the mass of a substance per unit volume. Volume is the amount of space an object occupies.
<span>I would have to go with.
D) The elements are found in the same column on the periodic table.</span>
Silver is in a compound as a reactant, but is a pure element as a product.
Answer:
Explanation:
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In this case, since the precipitation of the lead iodide is related to the iodide ion in solution, if we make react lead (II) nitrate with an iodide-containing salt, a possible chemical reaction would be:
In such a way, since 15.71 mL of a 0.5770-M solution of lead (II) nitrate precipitates out lead (II) iodide, we can first compute the moles of lead (II) nitrate in the solution:
Next, since there is a 1:2 mole ratio between lead (II) nitrate and iodide ions, we compute the moles of those ions:
Finally, since the mixing of the two solutions produce a final volume of 40.71 mL (0.04071 L), the resulting concentration (molarity) of the iodide ions in the student's unknown turns out:
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