sound travels at 331m/s. How long would it take for sound to travel across lake tahoe, which is 21.6 miles long

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

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?

What is the molar mass of a gas that has density of 2.054 g/l