What is the possible reason for trial b not obeying the law of conservation of mass?
a) too much vinegar was used.
b) the reaction happened too fast.
c) not enough baking soda was used.
d) the balloon-like device was not used in this trial.

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