Printers often use surfactants in the printing of paper with ink. Explain why this might be.

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

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When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?