Answer: 39.997 g/mol
Explanation: The mass for Sodium hydroxide is 39.997 g/mol (gram mole)
Answer: In a compound with molecular formula ,the valency of Y and X are 2 and 3 respectively.
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
The given compound is where X and Y combine and their oxidation states or valencies are exchanged and written in simplest whole number ratios. Thus the oxidation state or valency of X is 3 and that of Y is 2.
Because they are different elements have different number of protons and neutrons........ I guessed do not trust me...
Answer:
because that is the last group the ones before it are more reactive im sorry if this not what you were looking for.