(q)which of the following describes a chemical change (a) a. melting ice b. freezing water c. crushing rock d. lighting a match

Why does a red shoe appear red in daylight

The characteristic 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 and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: