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goldfiish [28.3K]
3 years ago
7

How many atoms in a 40 L sample of Ne?

Chemistry
1 answer:
Luda [366]3 years ago
3 0
I think 1 I’m not sure though
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Which of the following characteristics must be present for a substance to be called a mineral?
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The The thermal conductivity of a sheet of rigid, extruded insulation is reported to be k=0.029 W/ m measured temperature differ
vfiekz [6]

Answer:

Heat flux = 13.92 W/m2

Rate of heat transfer throug the 3m x 3m sheet = 125.28 W

The thermal resistance of the 3x3m sheet is 0.0958 K/W

Explanation:

The rate of heat transfer through a 3m x 3m sheet of insulation can be calculated as:

q=-k*A*\frac{\Delta T}{\Delta X}\\\\q=-0.029\frac{W}{m*K}*(3m*3m)*\frac{12K}{0.025m}  =125.28W

The heat flux can be defined as the amount of heat flow by unit of area.

Using the previous calculation, we can estimate the heat flux:

heat \, flux=\frac{q}{A}=\frac{125.28 W}{9 m^{2} }  =13.92 W/m^{2}

It can also be calculated as:

q/A=-k*\frac{\Delta T}{\Delta X}

The thermal resistance can be expressed as

\Delta T=R_t*Q\\R_t=\Delta T/Q=\frac{\Delta X}{k*A}

For the 3m x 3m sheet, the thermal resistance is

R_t = \frac{\Delta X}{k*A}=\frac{0.025m}{0.029W/mK*9m^{2}}=0.0958 \, K/W

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3 years ago
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Answer:

Explanation:

Silver Ag is lower in the electrochemical series to Potassium K therefore the reaction will not take place. In a displacement reaction for a particular metal to displace another, the metal must be more reactive or higher in the electrochemical series such as potassium displacing Copper or Zinc in a displacement reaction because potassium is higher in the electrochemical series.

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