What does the the release or absorption of energy indicate? a. physical change b. chemical change c. physical and chemical changes d. neither physical nor chemical changes

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.

Use the periodic table to determine how many grams of oxygen would be required to react completely with 859.0 g c2h2

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes? or no? this question is worth 20 points! let it be correct!