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which of the following is true about acids a. most acids are sour
b. most acid's corrode metals
c. every acid contains hydrogen
d. acids have a ph of greater than seven

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d