Answer:
Specific gravity of the sample = 8.947
Explanation:
Specific gravity of a substance is defined as the density of that substance divided by the density of water.
Density of water = 1000g/l
Density of substance = mass/volume
= 85/9.5 x 10^-3
= 8947.37 g/l
SG = 8947.37/1000
= 8.947
Answer:
The absorption and strength of the H-beta lines change with the temperature of the stellar surface, and because of this, one can find the temperature of the star from their absorption lines and strength. To better comprehend, let us look into the concept of the atom's atomic structure.
Atoms possess distinct energy levels and these levels of energy are constant, that is, the temperature has no influence on it. However, temperature possesses an influence on the electron numbers found within these levels of energy. Therefore, to generate an absorption line of hydrogen in the electromagnetic spectrum's visible band, the electrons are required to be present in the second energy level, that is when it captivates a photon.
Therefore, after captivating the photons the electrons jump from level 2 to level 4, which shows that there is an increase in the stellar surface temperature and at the same time one can witness a decline in the strength of the H-beta lines. In case, if the temperature of the surface increases too much, then one will witness no attachment of electron with the hydrogen atom and thus no H lines, and if the temperature of the surface becomes too low, then the electrons will stay in the ground state and no formation of H lines will take place in that condition too.
Hence, to generate a very robust H line, after captivating photons the majority of the electrons are required to stay in the second energy level.
Balanced chemical reaction:
C₃H₈(g) + 3H₂O(g) → 3CO(g) + 7H₂(g).
M(C₃H₈) = 44.1 g/mol; molar mass of propane.
M(H₂) = 2 g/mol; molar mass of hydrogen.
From balanced chemical reaction: n(C₃H₈) : n(H₂) = 1 : 7.
7m(C₃H₈) : M(C₃H₈) = m(H₂) : M(H₂).
7·8310 kg : 44.1 g/mol = m(H₂) : 2 g/mol.
m(H₂) = 2638.09 kg; mass of hydrogen.
The trend in ionization energy that occurs across a period on periodic table is that
Ionization energy of elements within a period generally increases from left to the right.
<u><em>explanation</em></u>
Ionization energy is energy required to remove an electron from gaseous atom or ion.
The ionization energy increase across the period because, as you move across the period (from the left to the right) the atomic radius decrease.
This make outer electrons to be closer to the nucleus and more attracted to the center.Therefore it is hard to remove electron as you move across the period.
Answer:
c. Gas particles don't interact
Explanation:
Ideal gas particles do not interact with each other.
The gas molecules do not interact with each other except for colliding with each other. Gases expand to completely fill a container; they would not if they were attracted to each other. That being said, they obviously still do, as a result of Dalton's Law.
