Magnesium sulfate
Magnesium sulfate is "a chemical compound with the formula MgSO₄.
Compound is "any substance with more than one element and a fixed ratio between them".
The mass of 1 mole of magnesium sulfate is 120.366g/mol.
1 mole of magnesium sulfate contain 6.022 x 10²³ units of magnesium sulfate.
120.366g/mol = 6.022 x 10²³ units of magnesium sulfate
= 25g x 6.022 x 10²³÷120.366g/mol
= 1.2507 x 10²³ units of magnesium sulfate.
Hence, 1.2507 units of magnesium sulfate molecules are present in 25g.
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