Question

Which of the following does NOT show the law of conservation of mass?
A. 24 g of Mg burn in 32 g O2 to produce 56 g of MgO.
B. 24 mL of Mg burn in 32 mL O2 to produce 56 mL of MgO.
C. 2 atoms of Mg react with 1 molecule of O2 to produce 2 units of MgO.
D. 1 atom of Mg reacts with 1 atom of O to produce a unit of MgO that contains 2 atoms.

Answer 1

id say it is:
B. 24 mL of Mg burn in 32 mL O2 to produce 56 mL of MgO.
cause volume is not same as mass and in that volume of solid you have more mass than it is its volume value...