calculate the number of moles of Mg in 0.12g(relative mass of Mg=24)
1 mole ----> 24 g
? mole -----> 0.12
moles ( Mg ) = 0.12 / 24
= 0.005 moles of Mg
0.005 moles
To calculate the number of moles of Magnesium (Mg) in 0.12g, you need to use the formula:
moles = mass / molar mass
In this case, the mass of Magnesium (Mg) is given as 0.12g, and the relative atomic mass of Mg is 24 g/mol.
Step-by-step solution:
1. Determine the molar mass:
The molar mass of Magnesium (Mg) is given as 24 g/mol.
2. Convert the mass in grams to moles:
moles = mass / molar mass
= 0.12g / 24 g/mol
3. Calculate the number of moles:
= 0.005 mol
Therefore, there are 0.005 moles of Magnesium (Mg) in 0.12g.