How many moles of HCI are needed to prepare 8.0 liters of a 4.0 M solution of HCI? 0.5 mol HCL

32 mol HCI

12 mol HCL

2 mol HCI

Consider the nuclear equation below. 239 > x + 4 he 94 2 what is x? 1.235 cm 96 2.243 u 92 3.235 u 92 4.243 cm 96

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

Which position represents spring in the southern hemisphere? a) b) c) d)