Mass of ZnO added=1.765 g
<h3>Further explanation:</h3>Given
30gms of 10%ZnO(Zinc oxide)
15% ZnO
Required
mass of ZnO added
Solution
Amount of ZnO in 30 gms of 10% ZnO =3 gms
For 15% ZnO : x= ZnO added
New solution = 30+x = 15%, so the equation :
Which one is harder, magnesium or calcium, and why?
1 answer:
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Answer:
The average thermal conductivity of the material at this temperature range is 3*10^(-9) W/mK.
Explanation:
The heat flow through this area of the metal panel can be expressed as:
being A the surface area, k the thermal conductivity, T2 and T1 the temperatures in each side and Y the thickness of the metal panel.
We have to rearrange the equation to clear k:
The average thermal conductivity of the material at this temperature range is 3*10^(-9) W/mK.
Answer:
(a) 1 atm, 8.72 L and 298 K respectively.
(b) 1 atm, 16.72 L and 573.35 K respectively.
(c)
Explanation:
Hello,
(a) In this case, considering that neon could be considered as an ideal gas, we can compute its volume as follows:
Thus, initial conditions of pressure volume and temperature are 1 atm, 8.72 L and 298 K respectively.
(b) Since the process was carried out at constant pressure, the work is defined as:
Thus, the final volume is:
And the final temperature is computed by considering the pressure-constant specific heat of neon (1.03 J/g*K) and the added heat:
Therefore, final volume is 16.72 L, final pressure is also 1 atm and final temperature is 573.35 K for this expansion process.
(c) Finally, the change in the internal energy is computed via the first law of thermodynamics:
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