Na^+ and NO3^- are spectator ions.
Before we decide on which ions are spectator ions, we need to look at the molecular reaction equation, complete ionic equation and net ionic equation.
The molecular reaction equation is;
AgNO3(aq) + NaCl(aq) -------> AgCl(s) + NaNO3(aq)
The complete ionic equation is;
Ag^+(aq) + NO3^-(aq) + Na^+(aq) + Cl^-(aq) -------> AgCl(s) + Na^+(aq) + NO3^-(aq)
The net ionic equation is;
Ag^+(aq) + Cl^-(aq) -------> AgCl(s)
The spectator ions are those ions that appear on both sides of the complete ionic equation. Hence, Na^+ and NO3^- are spectator ions.
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Sedimentary Rock
Here's Why:
Fossils also form from molds and casts. If an organism completely dissolves in sedimentary rock, it can leave an impression of its exterior in the rock, called an external mold.
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Answer: An interval is a range of values for a statistic.
Explanation:
For example, you might think that the mean of a data set falls somewhere between 10 and 100 (10 < μ < 100). That “somewhere between 5 and 15%” is an interval estimate.
B) $64 add it up
5x8=40
3x8=24
40+24=64
