When 20 g of cold water at 20.6 °C is used to cool down a cup of hot water containing 100g of water that is too hot for tea, at 95.7 °C, what is the final temperature of the slightly cooler water when the mixture has reached equilibrium? Cwater=4.186J/g

Hey guys so i need to know what is _nh3+> nh4oh ~chemistry~

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.

The kw for water at 0 °c is 0.12× 10–14 m2. calculate the ph of a neutral aqueous solution at 0 °c.