Answer:
36365.4 Joules
Explanation:
The quantity of Heat Energy (Q) released on cooling a heated substance depends on its Mass (M), specific heat capacity (C), and change in temperature (Φ)
Thus, Q = MCΦ
Since, M = 45.4 g
C = 3.56 J/g°C,
Φ = 250°C - 25°C = 225°C
Q = 45.4g x 3.56J/g°C x 225°C
Q= 36365.4 Joules
Thus, 36365.4 Joules of heat energy is released when the lithium is cooled.
Answer:
B: Physical Science
Explanation:
The answer is physical science because you need to know the laws of physics and chemistry to know how a car works. Physical sciences = the sciences concerned with the study of inanimate natural objects, including physics, chemistry, astronomy, and related subjects.
Answer:
the answer is most likely b, sorry if im wrong.
Explanation:
.....
To answer this question, all you to do is to divide the mass by the molar mass and that should get you your moles.

<em>= 3.5 mol NH₄</em>
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Answer:
The new pressure in the balloon is 16.3 atm
Explanation:
Gay-Lussac's law establishes the relationship between the temperature and the pressure of a gas when the volume is constant.
This law establishes that pressure and temperature are directly proportional quantities, that is to say that if the temperature increases the pressure increases and if the temperature decreases the pressure decreases.
Mathematically, Gay-Lussac's law states that, when a gas undergoes a constant volume transformation, the quotient of the pressure exerted by the gas temperature remains constant:

When you want to study two different states, an initial one and a final one, of a gas, you can use the expression:

In this case:
- P1= 14.7 atm
- T1= 273 K
- P2= ?
- T2= 303 K
Replacing:

Solving:

P2= 16.3 atm
<u><em>The new pressure in the balloon is 16.3 atm</em></u>