Question

All substances taking part in a certain interaction are shown below:

Butane is written followed by an addition sign followed by Oxygen followed by an equal to sign followed by Carbon dioxide followed by an addition sign followed by Water. Just below Butane 29 grams is written and just below Carbon dioxide and Water is a parentheses below which 133 grams is written

Which of the following is the correct estimate of the amount of oxygen used in the interaction?

Hint: The law of conservation of mass states that in a closed system, mass cannot be created or destroyed.

Group of answer choices

Difference between 133 g and 29 g (104 g)

Sum of 133 g and 29 g (162 g)

Answer 1

By conservation of mass, mass(reactants) = mass(products). So

mass(O2) = mass(products) − mass(butane) = 133 g − 29 g = 104 g.

Therefore the correct choice is the difference: 104 g.