Answer A
x-ray optical telescope.
hope this helps!.
It classify living organisms by2characteristics
The reaction is
CaC₂(s) + 2H₂O (l) -----> Ca(OH)₂ (s) + C₂H₂ (g)
As we have data of gas ethyne (or acetylene), C₂H₂
We can calculate the moles of acetylene and from this we can estimate the mass of calcium carbide taken
the moles of acetylene will be calculated using ideal gas equation
PV =nRT
R = gas constant = 0.0821 Latm/molK
T = 385 K
V = volume = 550 L
P = Pressure = 1.25 atm
n = moles = ?
n = PV /RT = 1.25 X 550 / 0.0821 X 385 = 21.75 mol
As per balanced equation these moles of acetylene will be obtained from same moles of calcium carbide
moles of calcium carbide = 21.75mol
molar mass of CaC₂ = 40 + 24 = 64
mass of CaC₂ = moles X molar mass = 21.75 X 64 = 1392g
The colomber pursues Stefano in order to give him a magic pearl. Hence, the option D is correct.
<h3>What is situational irony?</h3>
Situational irony is the irony of something happening that is very different to what was expected.
In the Colomber there is a situational irony and is that it was tasked to give Stefano a pearl that will give him good luck and success in life.
It is ironic that It was believed that the Colomber was a harbinger of death and that whoever sees it will be doomed for life.
The colomber pursues Stefano in order to give him a magic pearl. Hence, the option D is correct.
Learn more about the situational irony here:
brainly.com/question/2426558
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