A student was learning about elements. Which best describes elements? A. They cannot be combined with other substances.
B. They cannot be categorized as metals.
C. They cannot be broken down into simpler substances.
D. They cannot be separated from other substances.

What occurs when a cell engulfs large food particals

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?

In an exothermic reaction at equilibrium, what is the effect of lowering the temperature? a. the reaction makes more products. b. the reaction makes more reactants. c. the reaction is unchanged.