Which investigation will best test the effects of gravity on moving objects? A.
pencils falling from the same height

B.
balloons floating upward from the same height

C.
a bicycle speeding up on a flat surface

D.
a ball slowing down on a flat surface

Iknow #2 is d. i just need to know why

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j

Identify the correct mole ratio for each substance. sodium chloride (nacl) na: cl = 1: ammonium nitrate (nhno) h: o = 4: