Given the reaction represented by the equation Mg + 2HCl --> H2 + MgCl2, determine to two decimal places the molar masses of all substances involved. Then write the molar masses as conversion factors.
Answers
idk
To determine the molar masses of all substances involved in the reaction Mg + 2HCl → H2 + MgCl2, we can look up the atomic masses of the elements from the periodic table.
1. Magnesium (Mg): The atomic mass of magnesium is approximately 24.31 g/mol.
2. Hydrogen (H): The atomic mass of hydrogen is approximately 1.01 g/mol. Since there are two hydrogen atoms in the compound HCl, we'll multiply this atomic mass by 2.
3. Chlorine (Cl): The atomic mass of chlorine is approximately 35.45 g/mol.
Now let's write the molar masses as conversion factors:
1. For magnesium (Mg): 24.31 g/mol Mg
2. For hydrogen (H): 2.02 g/mol H (1.01 g/mol H x 2)
3. For chlorine (Cl): 35.45 g/mol Cl
These molar masses can be used as conversion factors to calculate various quantities in chemical reactions. For example, if you have the mass of a substance in grams, you can convert it to moles by using the molar mass as a conversion factor. Similarly, if you have the number of moles, you can convert it to grams by using the reciprocal of the molar mass.