Which is evidence that a chemical reaction has occured. a. a phase change occurs b. a new gas is observed in the form of bubbles c. red and yellow paint mixing to make orange paint d. the temperature of the substance remains constant

What is the force of attraction between the particles in a salt crystal

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

If two identical atoms are bonded, what kind of molecule is formed