Answer:
The needed heat is 47,65 Joules.
Answer:
definition 1. goes with B. meteoroid
definition 2. goes with C. meteor
definition 3. goes with A. meteorite
Hey there!:
Number of moles of iron:
Molar mass iron: 55.85 g/mol
0.676 / 55.85 => 0.012 moles of iron
Number of moles of fluorine:
Molar mass fluorine : 19 g/mol
0.460 / 19 => 0.024 moles of fluorine
Number of moles of water:
Molar mass water : 18.02 g/mol
0.870 / 18.02 => 0.048 moles of water
Simplest mol ratio is :
iron ( Fe ) = 0.012 / 0.012 => 1.0 mol
Florine ( F ) = 0.024 / 0.012 => 2.0 moles
Water ( H2O ) = 0.048 / 0.012 => 4 moles
Therefore:
Empirical formula is:
FeF2.4H2O
Hope that helps!
Answer:
C
Explanation:
We know that the pH of A is 1, which means that -㏒[H+] = 1. Solving for [H+], we see that it is equivalent to M.
Since the concentrations of [OH-] and [H+] have a product of , we can solve for the concentration of OH-:
[OH-] =
So the concentration of OH- in A is .
Now, we see that the pOH of B is 7, which means that -㏒[OH-] = 7. Solving for [OH-], we see that it is equivalent to M.
Finally, we can find the difference in concentration between point A and point B by dividing B by A:
Thus, the answer is C.
Hope this helps!