Zinc metal reacts with hydrochloric acid Zn + 2 HCl → ZnCl2 + H2
You add 0.156 mole of hydrochloric acid solution to 0.145 mole of zinc in a beaker
and waited several minutes for the reaction to complete. How many moles of
ZnCl2 was produced and what was the limiting reagent, Zn or HCI?

Select the correct answer how does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed? ca the value of is negative the value of qis positive the value of a remains constant the value of a decreases the value of equals zero e

1)each group 16 element has how many valence electrons? ( )4 ( )6 ( )8 ( )16 2)how many dots appear in the dot structure for calcium ion, ca2+? ( )zero ( )one ( )two ( )eight 3) which of the following atoms forms a cation to obtain an octet of outer shell electrons? ( )magnesium ( )oxygen ( )fluorine ( )helium 4) an al3+ ion contains 13 protons and 10 electrons. ( )true ( )false 5) valence and non-valence electrons are represented in lewis dot structures. ( )true ( )false

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder