A Mixture of Solid NaCl and CaCl₂ Contains 10

question 80

Multiple Choice

A mixture of solid NaCl and CaCl₂ contains 10.0 g of NaCl, and an unknown amount of CaCl₂. When the entire mixture is dissolved in 1.00 kg of water, the boiling point changes by 0.25 °C. What mass of CaCl₂ was in the original mixture?
K_b for water is 0.512 K^. kg ^. mol^-1.

• A) 5.4 g
• B) 8.1 g
• C) 35.2 g
• D) Not enough data to answer the question
• E) None of the above

Distinguish between different protist groups based on structural characteristics.

Understand the contribution of protists to ecological systems and human industry.

Identify protists that are beneficial or harmful to human activities.

Understand the concept and characteristics of hydrogen bonds.

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Definitions:

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