Answer:
Explanation:
First of all we need to find the amount of atoms per volume (m³). We can do this using the density and the molar mass.
Now, the fraction of vacancies is equal to the N(v)/N ratio.
- N(v) is the number of vacancies
- N is the number of atoms per volume calculated above.
Therefore:
The fraction of vacancies at 600 °C will be:
I hope it helps you!
Answer:
Explanation:
Hello,
In this case, the Boyle's is mathematically defined via:
Which stands for an inversely proportional relationship between volume and pressure, it means the higher the volume the lower the pressure and vice versa. In such a way, since the volume is decreased to one quarter, we can write:
We can compute the new pressure:
Which means the pressure is increased by a factor of four.
Regards.
Answer:
9.45 × 10⁻³ M
Explanation:
Step 1: Given data
- Mass of calcium nitrate (solute): 155 mg (0.155 g)
- Volume of solution: 100. mL (0.100 L)
Step 2: Calculate the moles of solute
The molar mass of Ca(NO₃)₂ is 164.09 g/mol.
0.155 g × 1 mol/164.09 g = 9.45 × 10⁻⁴ mol
Step 3: Calculate the molarity of the solution
The molarity is equal to the moles of solute divided by the liters of solution.
M = 9.45 × 10⁻⁴ mol/0.100 L = 9.45 × 10⁻³ M
D. The volume of a new substance has increased.