Answer:
[Fe(NO₃)₃] = 0.90 M
Explanation:
Molarity = Mol/L
Total volume of solution: 31.65 mL + 44.96 mL = 76.61 mL
Let's determine the moles of salt ([M] . volume)
0.03165 L . 1.07M = 0.0338 moles
0.04496L . 0.79M = 0.0355 moles
Total moles Fe(NO₃)₃ = 0.0338 + 0.0355 = 0.0693 moles
Volume of solution = 76.61 mL = 0.07661 L
0.0693 mol / 0.07661 L = 0.90 mol/L
See the image below.
Here are the points to remember.
1. The number of protons (atomic number) is the same whether an atom is neutral or ionic.
2. In a neutral atom, the number of electrons = the number of protons.
3. The number of electrons in each shell is 2, 8, 8, 18, 18, …
4. The number of electrons in an atom at the end of each period (a noble gas) is 2, 10, 18, 36, 54, …
5. An atom will gain or lose electrons to achieve a noble gas configuration.
For example, a potassium atom has 19 protons and 10 electrons. It will form an ion by losing one electron to get to 18 electrons.
Once you balance the enquation you "switch partners" of the element (negative charge to positive charge)
Answer:
Layer 8 is older than layer 1
Explanation: