Answer:
A. The cost of producing a kilowatt of power with fuel cell will be less than $30 in 2015
<u>Answer:</u> The volume of given amount of ethanol at this temperature is 159.44 mL
<u>Explanation:</u>
Specific gravity is given by the formula:
![\text{Specific gravity}=\frac{\text{Density of a substance}}{\text{Density of water}}](https://tex.z-dn.net/?f=%5Ctext%7BSpecific%20gravity%7D%3D%5Cfrac%7B%5Ctext%7BDensity%20of%20a%20substance%7D%7D%7B%5Ctext%7BDensity%20of%20water%7D%7D)
We are given:
Density of water = 0.997 g/mL
Specific gravity of ethanol = 0.787
Putting values in above equation, we get:
![0.787=\frac{\text{Density of a substance}}{0.997g/mL}\\\\\text{Density of a substance}=(0.787\times 0.997g/mL)=0.784g/mL](https://tex.z-dn.net/?f=0.787%3D%5Cfrac%7B%5Ctext%7BDensity%20of%20a%20substance%7D%7D%7B0.997g%2FmL%7D%5C%5C%5C%5C%5Ctext%7BDensity%20of%20a%20substance%7D%3D%280.787%5Ctimes%200.997g%2FmL%29%3D0.784g%2FmL)
Density is defined as the ratio of mass and volume of a substance.
......(1)
Given values:
Mass of ethanol = 125 g
Density of ethanol = 0.784 g/mL
Putting values in equation 1, we get:
![\text{Volume of ethanol}=\frac{125g}{0.784g/mL}=159.44mL](https://tex.z-dn.net/?f=%5Ctext%7BVolume%20of%20ethanol%7D%3D%5Cfrac%7B125g%7D%7B0.784g%2FmL%7D%3D159.44mL)
Hence, the volume of given amount of ethanol at this temperature is 159.44 mL
The answer is never because there's no electricity
Answer:is 1.08 kg
Explanation:
Just got it wrong and it gave me the answer