which two options are examples of chemical changes? 3 of 3 questions a white powder mixed with a clear…

which two options are examples of chemical changes? 3 of 3 questions a white powder mixed with a clear, colorless liquid makes a solution that is also a clear, colorless liquid. when two clear, colorless liquids are mixed together, a white solid forms. a white piece of paper turns black and gives off a smell when burned. a shiny metal bar glows red and expands when heated.

which two options are examples of chemical changes? 3 of 3 questions a white powder mixed with a clear, colorless liquid makes a solution that is also a clear, colorless liquid. when two clear, colorless liquids are mixed together, a white solid forms. a white piece of paper turns black and gives off a smell when burned. a shiny metal bar glows red and expands when heated.

Answer

Brief Explanations:

A chemical change results in a new substance being formed. When two clear, colorless liquids mix to form a white solid, a new substance (the solid) is created. When paper burns and turns black and gives off a smell, new substances are formed through combustion. Mixing to form a solution is a physical change as no new substance is formed. Heating a metal bar causing it to glow and expand is a physical change related to temperature - induced changes in physical properties like color and size, not a change in chemical composition.

Answer:

B. When two clear, colorless liquids are mixed together, a white solid forms. C. A white piece of paper turns black and gives off a smell when burned.