Chemistry

Stella Berger

8 March, 17:12

Hydrogen reacts with oxygen to produce water.

2H2 (g) + O2 (g) → 2H20 (1)

The mass of oxygen before and after the reaction

A.

varies with the experimental conditions

B.

is always the same.

C.

is sometimes same and sometimes different.

D.

is always different.

+3

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