Final answer:
To calculate the mass % of water in the hydrate MgCO₃⋅3H₂O, we need to divide the mass of water in the hydrate by the molar mass of the hydrate and multiply by 100%. molar mass of H₂O (water) is 18.016 g/mol, and the molar mass of MgCO₃⋅3H₂O (the hydrate) is approximately 118.3 g/mol. The mass % of water in the hydrate is approximately 45.7%.
Step-by-step explanation:
To calculate the mass % of water in the hydrate MgCO₃⋅3H₂O, we need to find the mass of water in the hydrate and divide it by the molar mass of the hydrate, then multiply by 100%. The molar mass of H₂O (water) is 18.016 g/mol, and the molar mass of MgCO₃⋅3H₂O (the hydrate) is approximately 118.3 g/mol. To find the mass of water in the hydrate, we multiply the molar mass of water by the coefficient (3) in front of the H₂O in the formula of the hydrate, so: mass of water = 3 * molar mass of water = 3 * 18.016 g/mol = 54.048 g/mol.
calculate the mass % of water in the hydrate MgCO₃⋅3H₂O, we need to divide the mass of water in the hydrate by the molar mass of the hydrate and multiply by 100%. molar mass of H₂O (water) is 18.016 g/mol, and the molar mass of MgCO₃⋅3H₂O (the hydrate) is approximately 118.3 g/mol. The mass % of water in the hydrate is approximately 45.7%. Now, we can calculate the mass % of water in the hydrate: mass % of water = (mass of water / molar mass of hydrate) * 100% = (54.048 g/mol / 118.3 g/mol) * 100% ≈ 45.7%