Which of the following has to remain constant to allow you to use the combined gas law for calculations? ОА.
pressure
OB.
volume
Ос.
temperature
OD
amount of gas

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

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 diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?