Final answer:
No, 1 mol of NaCl does not weigh the same as 1 mol of NaBr. The molar mass of NaCl is 58.44 g/mol, while the molar mass of NaBr is 102.89 g/mol.
Step-by-step explanation:
No, 1 mol of NaCl does not weigh the same as 1 mol of NaBr. The molar mass of NaCl is 58.44 g/mol, while the molar mass of NaBr is 102.89 g/mol. This means that 1 mol of NaCl is lighter than 1 mol of NaBr.
The molar mass of a substance is calculated by adding up the atomic masses of all the atoms in its chemical formula. In the case of NaCl, the molar mass is obtained by adding the atomic mass of sodium (22.99 g/mol) and the atomic mass of chlorine (35.45 g/mol). Similarly, for NaBr, the molar mass is obtained by adding the atomic mass of sodium (22.99 g/mol) and the atomic mass of bromine (79.90 g/mol).
Therefore, if you have 1 mol of NaCl and 1 mol of NaBr, the NaBr will have a higher mass than NaCl because bromine is heavier than chlorine.