WHICH SIGN CAN SAY THAT A PHYSICAL CHANGE HAS TAKEN PLACE 1.FORMATION OF GAS
2.FORMATION OF PRECIPITATE
3.EVOLUTION OF HEAT
4.ALL THE ABOVE

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

How many liters of hydrogen gas will be produced at stp from the reaction of 7.179×10^23 atoms of magnesium with 54.219g of phosphoric acid (h3po4) the equation is 3mg + 2h3(> mg(po4)2+3h2

How far is the region from the equator or control climate