0.52 g of sodium was added to 100 cm3 of water. Calculate: a) The volume of hydrogen evolved at 298 K and 100 kPa. b) The concentration of the sodium hydroxide solution produced, assuming the volume of water does not change. 2Na+ 2H2O + 2NaOH + H2​

The air is going to come out because of the low pressure.

Sorry i dont understand the question can you rephase it?

Wow that a lot of text for my tiny so i no wanna answer

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.