If an acid is splashed on your skin, wash at once with weak base.
O plenty of water.
soap.
O oil.

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all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.