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The diagram shown above represents the solubility curves of two salts, X and Y, in...

Chemistry
JAMB 1985

The diagram shown above represents the solubility curves of two salts, X and Y, in water, use this diagram to answer the question. If the molar mass of X is 36 g, the number of moles of X dissolved at 343 K is

  • A. 0.2 moles
  • B. 0.7 moles
  • C. 1.5 moles
  • D. 2.0 moles
  • E. 3.0 moles
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Correct Answer: Option D
Explanation

The molar mass of x = 36g. At 343k, 72g of x dissolved 

Molarity of x = \(\frac{72}{36}\) = 2.00moles.

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Project Topics and Materials, Post-UTME past questions - Download now or upload yours to get paid
Join your school's WhatsApp group
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Join your school's WhatsApp group
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Project Topics and Materials, Post-UTME past questions - Download now or upload yours to get paid