Asample that weighs 107.75 g is a mixture of 30% helium atoms and 70% krypton atoms. how many particles are present in the sample?

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

When water dissolves sugar, which process is not involved? o dissociation o hydration o surface area of the solute increases sa