How much hydrogen, in grams, could be obtained from 1.0 kg of ethanol (C25
HOH)?
How much hydrogen, in grams, could be obtained from 1.0 kg of ethanol (C25
HOH)?
A chemical known as pyrite is sometimes called Fool’s Gold because of it’s shiny color. However, it has no gold atoms in it at all! In fact, it’s just iron and sulfur atoms at a molar ratio of 1 mole of iron to 2 moles of sulfur. So, using this to determine its chemical formula, what, then, is the %Fe (by mass) in Fool’s Gold?
A.46.55
B.53.45
C.66.67
D.33.33
A dramatic classroom demonstration involves cooling a balloon
from room temperature (298 K) to liquid nitrogen temperature (77 K). If the initial volume of the balloon is 2.7 L, what is its volume after it cools? (Ignore the effect of any gases that might liquefy upon cooling.) Why and how?
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