The law of conservation of mass states that matter can neither be created on destroyed. This is shown when a chemical reaction has an
number of atoms on
both sides of the equation. (Fill in the blank)

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

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a. they are both space stations

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so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer