7. What does the mass for each element on the periodic table represent: a. A more accurate mass measurement including more significant figures
b. The regular average mass of all of the ions of that element
C. The weighted average mass of all of the isotopes of that element
d. Those masses include electrons into the mass calculation
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Which compound contain an iron with a 3+ charge

Which three statements represent the benefits of performing experiments using computer simulations?

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?