Answer:
Can you tell me the question in the comments on this answer or like how you do it then ill answer you in the comments under this answer
Answer:
Tempature is the measurment of how heat travels through a substance
Explanation:
Equilibrium is only static at a constant temperature, volume, concentration etc. If you change any of these things the position of equilibrium will shift right or left this being dynamic not static.
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<u>Answer:</u> The mass of HF reacted is 150 g.
<u>Explanation:</u>
We are given:
Amount of energy released = -345 kJ
For the given chemical reaction:
By Stoichiometry of the reaction:
184 kJ of energy is released when 4 moles of hydrofluoric gas is reacted.
So, 345 kJ kJ of energy will be released when = 
of hydrofluoric gas is reacted.
Now, to calculate the mass of HF, we use the equation:
Molar mass of HF = 20 g/mol
Moles of HF = 7.5 moles
Putting values in above equation, we get:
Hence, the mass of HF reacted is 150 g.
Answer:
Position D
Explanation:
One fourth of the Moon will be visible from Earth when the Moon is in position D. The reason why this is the right position is that the Moon will be in a position where the majority of its surface that is lighted by the Sun is facing the Sun. On the other hand, the angle is just right that about one quarter of the lighted part of the Moon is also facing the Earth. This will result in a perception from the Earth's view point that the Moon is lighted at one quarter of its surface.
