Chemistry
Grade-8
Easy
Question
If a reaction produces 28 grams, and one of its reactants had 12 grams, how much did the other reactant had?
- 14 grams
- 16 grams
- 20 grams
- 30 grams
Hint:
Reactant A+ Reactant B = product
The correct answer is: 16 grams
- According to the law of conservation of mass, in a low-energy thermodynamic process, the mass of the reactants must equal the mass of the products.
- Reactant A+ Reactant B = product
- 12 g + Reactant B = 28 g
- Reactant B = 28-12= 16grams.
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