PLEASE PLEAS HELP Which of the following compounds is insoluble in water? a) ZnSO4
b) K2SO4
c) Na2CO3
d) Ag2CO3

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has:

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u. s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?