6. Se hace reaccionar cloruro de potasio con ácido sulfúrico en exceso. Calculemos:
a) ¿cuántos moles de sulfato de potasio se
obtienen? b)¿cuántos moles de cloruro de
hidrógeno se obtienen?
Resp. a) 0.385 moles K2SO4; b) 0.77 moles HCI
2

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

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

While in europe, if you drive 125 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car’s gas mileage is 32.0 mi/gal? assume that 1 euro=1.26 dollars