Question

Convert mass to moles for both reactants. (round to 2 significant figures.) 2.50 g cuci2 equals moles e 0.25 g Al equals moles

Answer 1

Answer:

0.019 mole CuCl₂

0.0093 mole Al

Explanation:

To convert between grams and moles, you need to calculate the molar mass for each molecule. The molar mass is calculated using the molecular weights of each element. These values can usually be found on the periodic table. Once you have calculated the molar mass, you should multiply the ratio by the given value while allowing for the cancellation of units.

Reactant CuCl₂

Cu: 63.546 g/mol

Cl: 35.453 g/mol

Molar Mass (CuCl₂): 63.546 g/mol + 2(35.453 g/mol)

Molar Mass (CuCl₂): 134.452 g/mol

2.50 g CuCl₂              1 mole
--------------------  x  ----------------------  = 0.019 mole CuCl₂
                                 134.452 g

Reactant Al

Molar Mass (Al): 26.982 g/mol

0.25 g Al             1 mole
---------------  x  -------------------  = 0.0093 mole Al
                          26.982 g