What is energy efficiency, and why is increasing it important?

Three treatments of different starting materials are listed. Which statement explains the treatments? Substance 1 was activated by a decrease in temperature, Substance 2 was activated by the change in concentration, and Substance 3 decreased the

What determines an elements chemical properties?

Why are galaxies quickly moving away from eachother

How long does it take for plastic bags to decompose?

Which of the following reactions obeys the Law of Conservation of Atoms? H2O → H2 + O2 CuSO4 + Zn → ZnCl2 + Cu Zn + HCl → ZnCl2 + H2 PbCl2 + Al → AlCl3 + Pb Zn + 2HCl → H2 + ZnCl2

A cube of iron has a temperature of 35°C. It is placed on top of a hot surface with a temperature of 175°C. What will happen to the iron? A) Its temperature will decrease. B) Heat will flow from the hot surface into the iron.

Density differences cause the

Why can't you balance a chemical equation by changing the subscript?

Which level of organization is best represented by the corn plant? tissue, the highest level of organization organ, the lowest level of organization organism, the level of organization directly above organ system organ system, the level of

What is one product of a condensation reaction between two amino acids, such as glycine and alanine?