Which observation illustrates the law of conservation of mass?

the c: o mass ratio of a particular compound is the same, regardless of the size or source of the sample.

when 3 g of carbon reacts with 8 g of oxygen, 11 g of carbon dioxide is produced.

the c: o mass ratio of one compound is exactly double that of another compound.

burning 10 g of propane produces twice as much carbon dioxide as burning 5 g of propane.

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

Which compound most likely has the greatest bond energy?

What conclusion can you draw from this experiment about the components of the black ink?