Calculate total number of atom in 2.86 gm of Na2Co3*10H2o

How can you use chemical equations to predict the products of the reaction you can carry out?

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5