Answer:
0.11 atm
Explanation:
Given data
- Temperature (T): -16 °C + 273.15 = 257 K
- Ideal gas constant (R): 0.082 atm.L/mol.K
First, we will calculate the moles (n) of sulfur hexafluoride, considering its molar mass is 146.06 g/mol.
34 g × (1 mol/146.06 g) = 0.23 mol
Then, we can calculate the pressure (P) of sulfur hexafluoride using the ideal gas equation.
P × V = n × R × T
P = n × R × T / V
P = 0.23 mol × (0.082 atm.L/mol.K) × 257 K / 45 L
P = 0.11 atm
Answer:
Recycling and reuse of materials
Explanation:
One of the greatest problems facing the human population is the problem of solid waste disposal. The menace of solid waste disposal has led to the idea of landfills. Land fills are depressions on the earth surface prepared for the purpose of solid waste disposal.
The most important approach towards solid waste disposal is the idea of recycling of materials. A material can be collected after use and processed into the same material or serve as a precursor in another manufacturing process. This means that no waste is generated as the materials which are supposed to be disposed of as solid waste are processed into other useful materials. This will reduce the volume of solid wastes generated that may need to be disposed in a landfill.
The answer is the mass number! (:
Answer: True
Explanation: Every atom of the same element has the same atomic number of number of protons in its core. This is why chemists say that an atom is defined by its atomic number of the number of protons.
Unlike neutrons and electrons, you can't change protons. You can change the number of neutrons and it will still be the same element, but one is going to be a little bit heavier or a little bit lighter than another.
In addition, you can change electrons which creates
ions or charged atoms.
However, you can't change the protons.
For example, hydrogen has 1 proton in its nucleus no matter what and helium has 2 protons in its nucleus no matter what and so on.