trộn V₁ lit dung dịch BA(OH)₂ có pH=12 với V₂ lit dd HNO₃ pH=2 thu được ( V₁+ V2) lit dd có pH=10. Tỉ lệ V₁: V₂=?

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.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

the answer is true. hope it .