Calculate the number of moles of hydrogen gas that would be displaced from 52grams magnesium
To calculate the number of moles of hydrogen gas that would be displaced from a given mass of magnesium, we first need to determine the molar mass of magnesium and then use stoichiometry.
1. Find the molar mass of magnesium (Mg):
The molar mass of magnesium is the atomic mass of magnesium, which can be found on the periodic table. The atomic mass of magnesium is approximately 24.31 grams/mol.
2. Use stoichiometry to determine the moles of hydrogen gas (H2) displaced:
The balanced chemical equation for the reaction between magnesium and hydrogen gas is:
Mg + H2 -> MgH2
From the balanced equation, we can see that one mole of magnesium reacts with one mole of hydrogen gas to produce one mole of magnesium hydride.
3. Convert the mass of magnesium to moles:
Moles = Mass / Molar mass
Moles = 52g Mg / 24.31 g/mol Mg = 2.14 moles Mg
Therefore, 52 grams of magnesium is equal to 2.14 moles of magnesium.
4. Since one mole of magnesium reacts with one mole of hydrogen gas, the number of moles of hydrogen gas displaced is also 2.14 moles.
Therefore, the number of moles of hydrogen gas displaced from 52 grams of magnesium is 2.14 moles.