Which of the following is not an example of a chemical change?

Which group of atoms has this electron dot structure?

Identifying compounds Caffeine is the most widely used psychoactive drug in the world and is found in coffee beans, tea leaves, cola nuts, and other plant products.

My mom said that if i get held back in 7th i will go back to 6th bc supposedly that means i diddnt learn enough in 6th is that true

For Mn3+, write an equation that shows how the cation acts as an acid.

How many grams of O are in 585 g of Li2O

The characteristic flame test colors of metal ions are due to atomic emission spectra. Duscuss the relationship between the absoption and emission of light and the factors responsible for flame test colors.

Should a bartender use ice and scoop directly from ice machine or use an ice holding device and scoop to make drinks and refill drinks from

What classification should this reaction have? 4Al + 3O2 → 2Al2O3

If you start with 100 grams of a radionuclide, how much will you have after two half-lives have passed?

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.