Iron (Fe) is added to Hydrochloric acid (HCL) to produce Iron chloride (FeCL2) and Hydrogen (H2). What kind of a change is this?

they float because they are less dense than the water itself

something denser than water, like a rock, will sink to the bottom

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explanation:

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.

i need an image of the diagram