21.2 g of LiCl (molar mass 42.4 g/mol) is dissolved in 78.8 g of water initially at 23 °C. The solid is stirred until completely dissolved and the temperature when dissolved is found to be 67 °C. The specific heat of the solution is 4.2 J/g°C. Determine the molar enthalpy of dissolution in kJ/mol. A. -181 kJ/mol
B. -3.92 kJ/mol
C. -9.25 kJ/mol
D. -37.0 kJ/mol

Turbo the snail moves across the ground at a pace of 12 feet per day. if the garden is 48 feet away, how many days will it take for the snail to get there?

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

Chromosome 17 is made of over million base pairs.