Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

If a 96 gram compound contains 24 grams A what is the percentage of A?

Answer and explanation

Correct answer: 25 percent

The direct answer is B: 25 percent. Percentage by mass is calculated as \\(\\text{mass of part}/\\text{total mass}\\) multiplied by 100. The mass of A is 24 grams and the total mass of the compound is 96 grams. Therefore, percentage of A = \\(24/96\\times100=25\\%\\). Another quick observation is that 24 is one-fourth of 96, and one-fourth of 100 percent is 25 percent. Option A, 20 percent, does not come from the correct fraction. Option B is correct because it uses the mass of A as the numerator and the total compound mass as the denominator. Option C, 40 percent, is too large and would represent 38.4 grams in a 96-gram sample. Option D, 75 percent, is the percentage of the remaining 72 grams, not A: \\(72/96\\times100=75\\%\\). The denominator must always be the total mass when finding mass percentage. Remember: part divided by whole, then multiply by 100.

Related tags

Chemistry Laws CombinationLaws Of Chemical CombinationSome Basic Concepts Of ChemistryChemistryClass 11 Mcq

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.