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.

african americans demonstrated their newly found freedom by relocating often in search of relatives whom they had been separated from during slavery. others established schools to educate freed people and they built institutions such as churches and political organizations to advocate for their rights.

i'm pretty sure its b i might be wrong though!

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

it would be a gas formation