How many moles are in 4 x 1020 particles of Gold? What number goes on top of step 2? If you need to use 6.02 x 10^23 for your
answer please copy and paste it from this question (copy and paste any number
written in scientific notation from the problem).

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

the increase of protons   hope this

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2

може ли да зареждате повече информация, моля