Calculate number of moles in 76.9g of barium sulfate?

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How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

Imagine one batch of soup (batch “a”) is made with 8.19 g/can of salt, according to the recipe, and a second batch of soup (batch “b”) is made with 8.32 g/can of salt. explain which batch would be more resistant to frost damage if it is shipped a great distance in winter and explain why.