The rock outcrop, shown above demonstrates the law of included fragments. Identify the correct definition for the law of include
d fragments.
Any pieces of rock found in another layer are OLDER than the layer in which they are found.
Any pieces of rock found in another layer are YOUNGER than the layer in which they are found.
Any pieces of rock found in another layer are THE SAME AGE as the layer in which they are found.
Any pieces of rock found in another layer are not able to be relative age dated.
100 points if you answer correctly
Any pieces of rock found in another layer are OLDER than the layer in which they are found.
Any pieces of rock found in another layer are YOUNGER than the layer in which they are found.
Any pieces of rock found in another layer are THE SAME AGE as the layer in which they are found.
Any pieces of rock found in another layer are not able to be relative age dated.
100 points if you answer correctly
1 answer:
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0.040 mol / dm³. (2 sig. fig.)
<h3>Explanation</h3> in this question acts as a weak base. As seen in the equation in the question,
produces
rather than
when it dissolves in water. The concentration of
will likely be more useful than that of
for the calculations here.
Finding the value of from pH:
Assume that ,
.
.
Solve for :
Note that water isn't part of this expression.
The value of Kb is quite small. The change in is nearly negligible once it dissolves. In other words,
.
Also, for each mole of produced, one mole of
was also produced. The solution started with a small amount of either species. As a result,
.
,
,
.