Apuddle of water on the porch disappears after a few days. which statement justifies this phenomenon?
water loses energy to the atmosphere and is converted to steam.
water loses energy and freezes to ice, which is transparent.
water gains energy from sunlight and is converted to vapor.
water gains energy from sunlight and freezes to ice.
water loses energy causing the water molecules to shrink and disappear.
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Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.

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?