B since Oxygen is more electronegative, meaning they have a strong stronger pull on the electrons creating poles
Answer:
BaN, Ba₃N₂
Explanation:
In order to determine the empirical formula of a compound, we have to follow a series of steps.
Step 1: Determine the percent composition
Step 2: Divide each percentage by the atomic mass of each element
Step 3: Divide all numbers by the smallest one
Step 4: If necessary, multiply by a number so the coefficients are whole
Compound 1
Step 1
Ba: 90.745%
N: 100% - 90.745% = 9.255%
Step 2
Ba: 90.745/137.33 = 0.66078
N: 9.255/14.01 = 0.6606
Step 3
Ba: 0.66078/0.6606 ≈ 1
N: 0.6606/0.6606 = 1
The empirical formula is BaN.
Compound 2
Step 1
Ba: 93.634%
N: 100% - 93.634% = 6.366%
Step 2
Ba: 93.634/137.33 = 0.68182
N: 6.366/14.01 = 0.4544
Step 3
Ba: 0.68182/0.4544 = 1.5
N: 0.4544/0.4544 = 1
Step 4
Ba: 1.5 × 2 = 3
N: 1 × 2 = 2
The empirical formula is Ba₃N₂.
<span>this is a limiting reagent problem.
first, balance the equation
4Na+ O2 ---> 2Na2O
use both the mass of Na and mass of O2 to figure out how much possible Na2O you could make.
start with Na and go to grams of Na2O
55.3 gNa x (1molNa/23.0gNa) x (2 molNa2O/4 molNa) x (62.0gNa2O/1molNa2O) = 75.5 gNa2O
do the same with O2
64.3 gO2 x (1 molO2/32.0gO2) x (2 molNa2O/1 mol O2) x (62.0gNa2O/1molNa2O) = 249.2 g Na2O
now you must pick the least amount of Na2O for the one that you actually get in the reaction. This is because you have to have both reacts still present for a reaction to occur. So after the Na runs out when it makes 75.5 gNa2O with O2, the reaction stops.
So, the mass of sodium oxide is
75.5 g</span>
Answer:
1) increases
2) smaller
Explanation:
Generally, as electron- electron repulsion increases and more electrons are added to the atom while Z is held constant, the electron cloud size is increased. The size of the anion formed is usually measured as the size of this extended electron cloud. Hence the larger electron cloud means a larger anion size compared to the size of the neutral atom.
For a cation, the converse is true and the cation is found to be smaller than the neutral atom.
