Can someone help me to understand this question? 2Na(s) + 2H2O (I) —> Na+(aq) + 2OH-(aq) + H2(g)

1.15 g of sodium react completely with an excess of water. The resulting solution is diluted to 0.250 dm3. Calculate the concentration of hydroxide ions in the dilute solution. Answer in mol / dm3 to two decimal places.

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.