4. A glass of water is left outside on a hot, sunny
day. During the day, the
water evaporates at a
constant rate. If the water
is left out overnight, how
would you expect the rate
of evaporation to compare with the daytime rate?
A. higher
B. lower
C. the same
D. Nothing evaporates
during the night

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.