Use the conservation of mass lab to answer the question below. Consider the foll

Question

Use the conservation of mass lab to answer the question below. Consider the following reaction Identify which of the following are true statements The total number of hydrogen atoms before the reaction is equal to the total number of hydrogen atoms after the reaction The total number of chlorine atoms before the reaction is equal to the total number of The total mass of the reactants before the reaction is equal to the total mass of the sufur atoms after the reaction The mass of NaCl is equal to the mass of H2S.

Explanation / Answer

-------> if you count the no of hydrogens in the reactants, there are totally 2 Hydrogens in the reactants as well as in the products. So first option is correct.

-------> in the same way there are 2 Cl atoms on both sides of the reaction. Second option is also correct.

-------> Na2S : 78.04gr/mol, H2S: 34.08 gr/mol, HCl : 36.46 gr/mol, NaCl : 58.44 gr/mol

Therefore, 78.04 + 2*36.46 = 2*58.44 + 34.08 (151 = 151) law of conservation of mass is satisfied. So this third option is also correct.

--------> mass of NaCl 58.44 gr/mol is not equal to the mass of H2S: 34.08 gr/mol.

Finally the first 3 options are correct.

Thanks and please let me know if u have any further queries on this answer.

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