If 4.0 mol of hf react with 9.0 mol of sio which is the limiting reaction ​

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water

Ametal with a large number of free flowing electrons most likely has good conductivity

To present informationto make information easily available