Answer:
1.16L can be made
Explanation:
Molarity = Mol / Volume
Volume = Mol / Molarity
Let's determine the moles of salt, with that mass:
130 g FeCl₂ . 1mol / 126.75 g = 1.02 moles of FeCl₂
Volume = 1.02 mol / 0.88 mol/L → 1.16L
The location of the valence electron or the outermost electron is expressed in quantum numbers. There are five quantum numbers: prinicipal (n), angular momentum (l), magnetic (ms) and magnetic spin (ms) quantum numbers. This is based on Bohr's atomic model where electrons orbit around the nucleus. These electrons are in the orbitals with specific energy levels. Starting from energy level 1 that is closest to the nucleus, the energy level decreases to 2, 3, 4, 5, 6, and 7. These energy level numbers represent the principal quantum number. Within each orbital also contains subshell. From increasing to decreasing order, these subshells are the s, p, d and f subshells. These subshells represent the angular momentum quantum numer. Specifically, s=0, p=1, d=2 and f=3. Therefore, if the electron is in the orbital 5p, the quantum number would be: 5, 1. Applying these, the correct pairing would be:
2p: n=2. l=1
Answer:
The percent by mass of benzoic acid = 89.7 %
Explanation:
Step 1: Data given
Molarity of NaOH = 0.2099 M
Mass of the sample = 1.021 grams
Volume of NaOH = 35.73 mL = 0.03573 L
Step 2: The balanced equation
C6H5COOH(aq) + NaOH(aq) → NaC6H5COO(aq) + H2O(l)
Step 3: Calculate moles NaOH
Moles NaOH = molarity NaOH * volume NaOH
Moles NaOH = 0.2099 * 0.03573 L
Moles NaOH = 0.00750 moles
Step 3: Calculate moles benzoic acid
From your balanced equation - benzoic acid reacts in 1:1 molar ratio with NaOH
The sample must have contained 0.00750 moles benzoic acid
Mass benzoic acid in 0.00750 moles = 0.00750 * 122.12 = 0.9159 g benzoic acid
Mass % acid in sample = 0.9159/1.021 * 100 = 89.7% purity.
The percent by mass of benzoic acid = 89.7 %
