Asolid mass of 25 g is mixed with 60 g of a solution. a chemical reaction takes place and a gas is produced. the final mass of the mixture is 75 g. what is the mass of the gas released?

Law of conservation of mass

Solid mass(25g)+ solution(60g)---> gas(x)

Total mass of reactants = total mass of products

25 + 60=75+x

85=75+x

10=x

10g

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