What methods do scientists use to determine if a change was physical or chemical?

Which are most responsible for creating acid rain pollution? A nuclear power plants B coal-burning power plants C hydroelectric power plants D wood-burning power plants

What do all isotopes of the same element have in common? atomic mass chemical stability number of neutrons number of protons

Which reaction can provide the energy needed to run an endergonic reaction?

In the reaction MgCl2 + 2KOH Mg (OH) 2 + 2KCl, how many moles of Mg (OH) 2 are produced for every mole of MgCl2?

Which has more mass a kilogram of bricks or a kilogram of feathers explain

What is a cause of polarity in water molecules?

Which is the force of attraction that holds atoms together? A. gravity B. friction C. physical bond D. chemical bond

Chemical bonding ranges from even electron sharing to total electron transfer because Select one: a. atoms on the periodic table have many different electronegativities b. some atoms can make more bonds than other atoms can c.

An atom that has the same amount of atoms of each element on both sides of the reaction obeys what law

Whats the main difference between a double replacement reaction and a single replacement