What is the concentration of hydronium ions in (a) a solution that is 0.075 M HCN(aq) and 0.060 M NaCN(aq); (b) a solution that is 0.20 M NH 2 NH 2 ( aq ) and 0.30 M NaCl(aq); (c) a solution that is 0.015 M HCN(aq) and 0.030 M NaCN(aq); (d) a solution that is 0.125 M NH 2 NH 2 ( aq ) and 0.125 M NH 2 NH 3 Br ( aq )

the mass of the cathode increases because ions from the solution get reduced to atoms and become part of the cathode.

explanation:

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stan bts

c. 75.7

i think that is the right

1.solid

2.carbon dioxide

3.helium

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.