In a chemical reaction, two molecules with a total mass of 76 amu react to form a single molecule. What is the mass of the molecule that is formed? (1 point)
• 152 amu
• 76 amu
• 228 amu
• 38 amu
1 answer
The law of conservation of mass states that mass is neither created nor destroyed during a chemical reaction. Therefore, the total mass of the reactants must be equal to the total mass of the product. If the two molecules that react have a total mass of 76 amu, then the molecule that is formed must also have a mass of 76 amu. Therefore, the correct answer is 76 amu.