Hydrated Crystals Lab. In the experiment of Hydrated Crystals the formula for the compounds had to be found including the water.

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Standard Equation: Subtracting including uncertainties

Subtraction of two mass numbers along with uncertainty.

Question: Subtraction of mass of 3g of MgSO4 + evaporating dish + 0.02g  - Evaporating dish ± 0.01g = ?

Subtraction of mass of :

3g of MgSO4 + evaporating dish ± 0.02g = 31.04 + 0.02g

Evaporating dish ± 0.01g = 27.96 + 0.01g

1) Subtract both of the masses together or insert in this formula: 3g of MgSO4 + evaporating dish ± 0.02g -  evaporating dish ± 0.01g = ?

3g of MgSO4 + evaporating dish ± 0.02g = 31.04 + 0.02g

Evaporating dish ± 0.01g = 27.96 ...

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