Answer:
W=-37.6kJ, therefore, work is done on the system.
Explanation:
Hello,
In this case, the first step is to compute the moles of each gas present in the given mixture, by using the total mixture weight the mass compositions and their molar masses:
Next, the total moles:
After that, since the process is isobaric, we can compute the work as:
Therefore, we need to compute both the initial and final volumes which are at 260 °C and 95 °C respectively for the same moles and pressure (isobaric closed system)
Thereby, the magnitude and direction of work turn out:
Thus, we conclude that since it is negative, work is done on the system (first law of thermodynamics).
Regards.
Antimony cannot be broken down by chemical means because it is an element, a principle building block of matter. All other choices are compounds, which can be separated if put through enough stress to break the bonds between the atoms.
Answer:
The answer to this question is 3. Kinetic energy decreases as temperature decreases.
Explanation:
The average Kinetic energy is given by
× × T where
K = The average molecular kinetic energy of the gas (J)
= Boltzmann's constant (1.38× J/K)
T = Temperature of the gas in Kelvin (k)
When the temperature of a given mass of gas drops average kinetic energy of the molecules goes down and the average molecular speed decreases. The lower kinetic energy which is the energy of motion of the molecules indicates lower speed of the molecules.
Note that, the kinetic energy and average speed are related by the following formula
KE = ×m×v²
Where KE = Kinetic energy in Joules (J)
v = the velocity in m/s and
m = the mass of the molecule in Kg
Answer:
we are given that
Student converts grams to milligrams by multiplying by the conversion factor 1g/1000 mg.
we have been asked to find Is the student performing this calculation correctly?
Suppose you have x grams of something and convert it into mg as follows:
As we know that
So we can write
mg
It mean that conversion factor is
It mean student doesn't performed the calculations correctly.
Explanation:
Answer:
- <u>Ten (10) molecules of water</u><em> are bonded to sodium sulfate decahydrate.</em>
Explanation:
A hydrated compound is one that contains water molecules chemically bonded. So, the correct question is how many waters are <u><em>bonded</em></u> to sodium suilfate?
The latin prefix<em> deca</em> means ten (10), and the word <em>hydrate </em>means that contains water; then, <em>decahydrate</em> is used in chemistry to designate a compound that is bonded to 10 parts (molecules) of water.
Hence, sodium sulfate decahydrate means that each molecule of the compound is bonded to 10 molecules of water.
In the chemical formula, the water molecules of a hydrated compound are shown after the chemical formula of the compound using a period and a coefficient (the number of water molecules bonded) before the water molecules.
Then, given that the chemical formula for sodium sulfate is Na₂SO₄, the chemical formula for sodium sulfate decahydrate is Na₂SO₄·10H₂O.