Which of these are isotopes (NOT IONS or compounds) *
Ca+
Naci
O CHA
O Sodium-21
o Lithium-4
H2O
Oxygen-15
0 02
1
Helium-3
On
This is a required question

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?

Air can be considered a mixture. which statement does not explain why?

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.