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A 120 g compound contains 30 g of B. What is the mass percentage of B in the compound?120 g के एक यौगिक में B का द्रव्यमान 30 g है। यौगिक में B का द्रव्यमान प्रतिशत कितना है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 25%25%
Mass percentage of B = (mass of B ÷ mass of compound) × 100 = (30 g ÷ 120 g) × 100 = 25%.B का द्रव्यमान प्रतिशत = (B का द्रव्यमान ÷ यौगिक का द्रव्यमान) × 100 = (30 g ÷ 120 g) × 100 = 25% है।
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