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GREYUIT [131]
3 years ago
13

PLS HELP ME

Chemistry
1 answer:
DIA [1.3K]3 years ago
4 0

Number of men required to stand on top of each other to reach moon from earth are :

\boxed{ \boxed{ \:  \:  \:  \:  \:  \:  \: 210320000 \:  \:  \:  \:  \:   \: \: }}

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I have five less protons than the least massive metalloid in<br> the fourth period. Who am I?
exis [7]

Answer:

You are the Cobalt

Explanation:

The least massive metalloid in the fourth period is Germanium, and it have 32 protons. If you have 5 less protons: 32 - 5 = 27 protons. The element with 27 protons is Cobalt

6 0
3 years ago
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

4 0
3 years ago
Why methylene blue is blue
bixtya [17]

Methylene blue indicates the presence of oxidizing agents because it is oxidized itself by these compounds. When electrons are stripped from methylene blue, the resulting molecule imparts a blue color to the solution--giving a clear sign of a chemical change.

7 0
3 years ago
4. Identify What do scientists call a substance that forms during a chemical reaction?
ioda

Answer:

4. Reactant

5. Left

I hope this helps ❤️❤️

7 0
3 years ago
How much energy is needed to raise the temperature of 850g of aluminum from 22.8 °C to 194.66 if the specific heat of aluminum
ch4aika [34]

Answer: I think it is 94.6 degrees Celsius

Explanation:

3 0
2 years ago
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