Emergency only one question

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

How many grams of n2h4 will be consumed by 23 g of n2o4

Between 2014 and 2016, more than 25,000 children in flint, michigan, drank water that was contaminated with lead from lead pipes. during this time, the city claimed the water was safe to drink. which of these actions could the city have taken to ensure that the drinking water was free from lead?