How is a chemical change different from a physical change?

According to Table I, which salt releases energy as it dissolves? (1) KNO3 (3) NH4NO3 (2) LiBr (4) NaCl

A galvanic cell consists of a ni2 + / ni half-cell and a standard hydrogen electrode. if the ni2 + / ni half-cell standard cell functions as the anode, and the standard cell potential is 0.

On any given night, provided that the sky is clear, all of the planets which can be seen with the naked eye will not be visible at the same time. This is because they all have different A) moons B) orbits C) shapes D) sizes

What is the internal energy u of one mole of air on a very hot summer day (35∘c) ? express your answer numerically in joules to two significant figures?

A buffer solution based upon sulfurous acid (H2SO3) was created by treating 1.00 L of a 1.00 M sulfurous acid solution with NaOH until a pH of 1.135 was achieved (assuming no volume change). To this buffer 1.

A critical biotic factor in Yellowstone National Park is A) geographic isolation B) high elevation C) high temperature in the summer D) population of wolves E) proximity to water

If energy can neither be created nor destroyed in a chemical reaction, what can happen to the energy

Effect of ph on conformation of aplha helix

How can we tell when something is polar or non-polar in an Inter-molecular Force?

A reaction is most likely to occur when reactant particles collide with