Determine the type of reaction: agno3 + cu --> cu(no3)2 + ag double displacement single displacement synthesis decomposition

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

Which type of fossil does this image depict?

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