Answer:
3.5hrs
Explanation:
Using the formula Speed = Distance/Time
Given
Speed = 8mi/hr
Distance = 28miles
Get the time
Time = Distance/Speed
Time = 28/8
Tme = 3.5hrs
Hence it will take 3.5hrs to travel
Some forms of transportation are meant for small short trips while other forms of transportation are meant for big long trips
Answer:
![2.82x10^{23}molecules](https://tex.z-dn.net/?f=2.82x10%5E%7B23%7Dmolecules)
Explanation:
Hello.
In this case, given the volume (1cm³=1mL) and density of the bromine we are to firstly compute the mass since it will allow us to compute the representative particles:
![\rho =\frac{m}{V}](https://tex.z-dn.net/?f=%5Crho%20%3D%5Cfrac%7Bm%7D%7BV%7D)
![m=\rho *V=3.12g/cm^3*24.0cm^3\\\\m=74.88gBr_2](https://tex.z-dn.net/?f=m%3D%5Crho%20%2AV%3D3.12g%2Fcm%5E3%2A24.0cm%5E3%5C%5C%5C%5Cm%3D74.88gBr_2)
Next, since the mass of one mole of diatomic bromine is 159.82 g (one bromine weights 78.91), we can next compute the moles in that sample:
![n=74.88g*\frac{1mol}{159.82g} =0.469molBr_2](https://tex.z-dn.net/?f=n%3D74.88g%2A%5Cfrac%7B1mol%7D%7B159.82g%7D%20%3D0.469molBr_2)
Finally, via the Avogadro's number we can compute the representative particles of bromine as follows:
![particles=0.469mol*\frac{6.022x10^{23}molecules}{1mol}\\ \\2.82x10^{23}molecules](https://tex.z-dn.net/?f=particles%3D0.469mol%2A%5Cfrac%7B6.022x10%5E%7B23%7Dmolecules%7D%7B1mol%7D%5C%5C%20%5C%5C2.82x10%5E%7B23%7Dmolecules)
Best regards.
Answer:
The inside layer of skin is the Insulator layer.
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Answer:
poH= -log(oh^-)
= - log (0.500* 10^-11)
= =- log 0.5 + log (10^-11)
= -( -0.30 +(-11))
=+ 11.3