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lesya692 [45]
2 years ago
7

Plzz help guyss I'm so confused

Chemistry
1 answer:
Serga [27]2 years ago
8 0
5 because A=v/t 20/4=5
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A scientist is studying a sample of matter. The matter has no definite shape or volume, and it can conduct an electric current.
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It is because gas and plasma have no definite shape and volume but plasma can conduct an electric charge

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What is the correct reaction for the dissociation (ionization) for a weak acid?
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BRANILEST IF RIGHT <br><br> WAVE A OR B
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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]

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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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2CaO + 2CO2 → 2CaCO2 + O2 is right

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