Answer:
![\Delta U=-50J](https://tex.z-dn.net/?f=%5CDelta%20U%3D-50J)
Explanation:
Hello,
In this case, we use the equation regarding the first law of thermodynamics which is:
![Q-W=\Delta U](https://tex.z-dn.net/?f=Q-W%3D%5CDelta%20U)
In this case, the want to compute the change in thermal energy of the gas which is related with ΔU. In such a way, since the 10 J are being removed, they are set as negative in the aforesaid equation, moreover, the 40 J of work are positive since it is a work done on the system. Hence:
![-10J-40J=\Delta U\\\Delta U=-50J](https://tex.z-dn.net/?f=-10J-40J%3D%5CDelta%20U%5C%5C%5CDelta%20U%3D-50J)
Best regards.
Answer:
water dissolves carbon dioxide
Explanation
carbon dioxide is soluble in water therefore when water is present it is unstable because it will keep dissolving.
Answer: It shows that the object is supposedly moving toward the observer
Explanation: A spectrum typically displays intensity and wavelength which characterises light.
Answer:
Q1: 2. Molarity.
Q2: 2.51 x 10⁻³.
Explanation:
<u><em>Q1:</em></u>
- The molarity is defined as the no. of moles of solute in one liter of solution.
- It is can be calculated from the relation: M = (no. of moles of solute)/(Volume in L of the solution).
<u><em>Q2:</em></u>
∵ pH = - log[H₃O⁺]
∴ 2.60 = - log[H₃O⁺]
log[H₃O⁺] = -2.6.
<em>∴ [H₃O⁺] = 2.51 x 10⁻³.</em>