How much energy is required to melt 43.2 g of NaCl at its melting point of 801 ◦C? (∆H of fusion = 478.6 J/g)

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude