What is the chemical formula for sodium chromate tetrahydrate?
A) Na₂CrO₄ • 2H₂O
B) Na₂CrO₄ • 3H₂O
C) Na₂CrO₄ • 4H₂O
D) Na₂Cr₂O₇ • 3H₂O
E) Na₂Cr₂O₇ • 4H₂O
Correct Answer:
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