how much heat is lost when a 640 g piece of copper cools from 375 °c,
to 26 °c & (the specific heat of copper is 0.38452 j/gºc)

One mole of zinc has a mass of 65.4 grams. approximately how many atoms of zinc are present in one mole of zinc? 32 × 1023 atoms 6 × 1023 atoms 66 atoms 65 atoms

Can someone me with 1 to 4 plz. fast

Apump contains 0.5 l of air at 203 kpa. you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump