Answer:
12
Explanation:
The number of nearest neighbors (atoms that make contact) around each atom in a face-centered cubic lattice of a metal is
12.
This is because in a face centered cubic lattice ,there are ions found at the center of each of the six faces which are usually packed together and in close contact with one another.
Answer:
A) The mass would be the same.
Explanation:
Since there is no loss of any particle to vapor during the phase change process from solid to liquid, the mass of the before and after the process will remain the same.
- In this way, the law of conservation of mass is obeyed.
- Mass is the amount of matter contained in a substance.
- Since there is no room for escape or matter loss, the mass will remain the same.
Answer:
There are 1.8 moles of aluminum.
Explanation:
To solve this problem we need to convert moles of pyrophillite (Al₂Si₄O₁₀(OH)) into moles of aluminum (Al):
- In one mol of Al₂Si₄O₁₀(OH) there are two moles of Al.
With the above information in mind we can now <u>do the conversion</u>:
- 0.900 moles Al₂Si₄O₁₀(OH) *
= 1.8 mol Al
Thus the answer is that there are 1.8 moles of aluminum.
Answer:

Explanation:
Here, we want to know the number of atoms of each of the elements present in the given term
For the Barium, it is only affected by the external 2, so we have 2 Barium atoms only
For oxygen, we have a set in OH and another in H2O. For the OH own, we have 2 oxygen atoms and for the H2O , we have 8 atoms. That makes a total of 10, which when multiplied by the first 2 outside, gives 20
For Hydrogen, we have two sets, one with OH and the other with H2O
For the one with OH, we have 2 while for the one with H2O, we have 16. That makes a total of 18 which when multiplied by 2 gives a total of 36
Thus, we have each of the elements and their counts as follows:
Barium = 2
Oxygen = 20
Hydrogen = 36
Mathematically:

Thus: