Answer:
see explanation below
Explanation:
First, you are not providing any data of the bromide solution to calculate the mass. So, in order to help you, I will take some random values from a similar exercise, so you can solve this later with your data.
Let's suppose you add 360 mL of a 1.45 mol/L of a calcium bromide solution into the flask. To calculate the mass it was added, you need to calculate first the moles added. This can be done with the following expression:
M = n/V
Where:
M: molarity of solution
n: moles of solution
V: volume (in liters) of solution
here, you have to solve for n, so:
n = M*V
replacing the above data you have:
n = 1.45 * (0.360) = 0.522 moles
Now that we have the moles, you can calculate the mass by the following expression:
m = n * MM
Where MM it's the molar mass of calcium bromide. The reported MM of calcium bromide is 199.89 g/mol, so replacing:
m = 199.89 * 0.522
m = 104.34 g
And this is the mass that was added of the solution. As I stated before, use your data in this procedure, and you should get an accurate result.
Answer: The Taiga Forest
Explanation: I just took the test on e2020
Las 3 partículas elementales son a) electrón, protón y neutrón. Se encuentran b) electrón en las órbitas electrónicas, el protón y el neutrón están en el núcleo. Sus cargas son c) electrón-negativo; protón-positivo; neutrón-sin carga. (Opción A).
Según el modelo atómico moderno, las partículas elementales que componen la materia son:
- Electrón, se ubica en las órbitas electrónicas y tiene carga negativa.
- Protón, se ubica en el núcleo y tiene carga positiva.
- Neutrón, se ubica en el núcleo y no tiene carga
Las 3 partículas fundamentales son a) electrón, protón y neutrón. Se encuentran b) electrón en las órbitas electrónicas, el protón y el neutrón están en el núcleo. Sus cargas son c) electrón-negativo; protón-positivo; neutrón-sin carga. (Opción A).
Aprende mas: brainly.com/question/22693941
Answer: The Pauli Exclusion Principle
Explanation:
The electrons are filled in orbitals of equal energy with one electron entering each orbital until all the orbitals contain one electron with the same spin. The pairing of electrons take place thereafter.
The first electron in an orbital could have +1/2 spin or -1/2 spin. All of the electrons in singly occupied orbitals have the same spin so as to maximize total spin. which is given by Hunds rule.
Two electrons must have opposite spin and thus different spin quantum numbers is given by Pauli's exclusion principle.
Answer:
- All alkalies are bases but all bases are not alkalies
- all alkalies are soluble in water but all bases are not alkalies .
hope it is helpful to you