How Many Joules are removed when 83.5 grams of steam cools from 200.0C to -35.0C? Five step problem- don't forget to add up the answers to get the total energy!

How many moles of oxygen gas are produced from the decomposition of six moles of potassium

Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g.  what is the percent by mass of water in the hydrate?   %

Which of the following warnings would an agricultural chemist tell a farmer who wants to recycle his or her own ammonia? recycling ammonia is a difficult process that sometimes takes weeks. recycling ammonia requires a degree in biochemistry or a related field. recycling ammonia can be harmful because it is highly flammable and toxic. recycling ammonia costs too much money considering the price of the necessary chemicals.