YOU SAID:

the mass of the products of a reaction is equal to the mass of the reactants

INTO JAPANESE

反応物の質量が反応の質量に等しい

BACK INTO ENGLISH

The mass of the reactants is equal to the reaction mass

INTO JAPANESE

反応の質量は反応に等しい質量

BACK INTO ENGLISH

Reaction mass is equal to the reaction mass.

INTO JAPANESE

反応質量は反応に等しい質量。

BACK INTO ENGLISH

Reaction mass is equal to the reaction mass.