Answer:
7.36
Explanation:
my teacher said that was the right answer
The rate of change of the temperature of the Earth's surface is given to,
90°F/mile
To determine the temperature x miles away from the surface, we multiply the depth by the given rate. This will give us the answer of,
T = (90°F/mile)(90 mile)
= 8100°F
Thus, the temperature 90 miles deep in the Earth's surface is equal to 8100°F.
If 125 mL of a 3.5 M solution were evaporated, 0.438 moles of iron (II) nitrite would be recovered.
<h3>What is molarity?</h3>
Molarity is a measure of the concentration of a chemical species, in particular of a solute in a solution, in terms of moles of solute per liter of solution.
We want to find the moles of iron (II) nitrite (solute) in 125 mL of a 3.5 M solution. We will use the definition of molarity.
M = n / V(L)
n = M × V(L) = 3.5 mol/L × 0.125 L = 0.438 mol
where,
- M is the molarity.
- n is the number of moles.
- V(L) is the volume of the solution in liters.
If 125 mL of a 3.5 M solution were evaporated, 0.438 moles of iron (II) nitrite would be recovered.
Learn more about molarity here: brainly.com/question/9118107