Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- A 3.40-g sample of a mixture of naphthalene (C₁₀H₈) and pyrene (C₁₆H₁₀) is dissolved in 35.0 g benzene (C₆H₆). The freezing point of the solution is 2.29°C. What is the mass (in grams) of the naphthalene in the sample mixture? The freezing point of benzene is 5.51°C and Kf is 5.12°C・kg/mol.arrow_forwardWhen 498. mg of a certain molecular compound X are dissolved in 25.0 g of dibenzyl ether ((C6H-CH₂)₂O), the freezing point of the solution is measured to be 0.8 °C. Calculate the molar mass of X. If you need any additional information on dibenzyl ether, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 2 significant digits. 0 8 0.2 ロ・ロ X Garrow_forwardWhen 258. g of alanine (C,H,N02) are dissolved in 850. g of a certain mystery liquid X, the freezing point of the solution is 6.4 °C lower than the freezing point of pure X. On the other hand, when 258. g of ammonium chloride (NH,Cl) are dissolved in the same mass of X, the freezing point of the solution is 16.6 °C lower than the freezing point of pure X. Calculate the van't Hoff factor for ammonium chloride in X. Be sure your answer has a unit symbol, if necessary, and round your answer to 2 significant digits. i = Ox10 ?arrow_forward
- When 2.43 g of a certain molecular compound X are dissolved in 65. g of formamide (NH₂COH), the freezing point of the solution is measured to be -0.4 °C. Calculate the molar mass of X. If you need any additional information on formamide, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 2 significant digits.arrow_forwardDo not give handwriting solution.arrow_forwardaluminum hydroxide has a Ksp value of 2.0x10-32. This indicates that aluminum hydroxide is miscible in water. that almost no aluminum hydroxide will dissolve in water. the amount of aluminum hydroxide that will dissolve in water cannot be determined from this value. that a significant amount of aluminum hydroxide will dissolve in water.arrow_forward
- The normal freezing point of a certain liquid X is 0.10 °C, but when 18. g of potassium bromide (KBr) are dissolved in 400. g of X the solution freezes at -1.2 °C instead. Use this information to calculate the molal freezing point depression constant K, of X. Round your answer to 2 significant digits. K₁ = 1 °C kg mol 1 Darrow_forwardThe names and chemical formulae of some chemical compounds are written in the first twa columns of the table below. Each compound is soluble in water. Imagine that a few tenths of a mole of each compound is dissolved in a liter of water. Then, write down in the third column of the table the chemical formula of the major chemical species that will be present in this solution. For example, you know water itself will be present, so you can begin each list with the chemical formula for water (H,O).arrow_forward[References] Use the References to access important values if needed for this question. The boiling point of ethanol, CH3 CH₂OH, is 78.500 °C at 1 atmosphere. K₁ (ethanol) = 1.22 °C/m In a laboratory experiment, students synthesized a new compound and found that when 14.95 grams of the compound were dissolved in 293.3 grams of ethanol, the solution began to boll at 78.570 °C. The compound was also found to be nonvolatile and a non-electrolyte. What is the molecular weight they determined for this compound? g/mol Submit Answer Retry Entire Group 9 more group attempts remaining Show Hint Congage Learning Cengage Technical Support Previous Next Save and Exitarrow_forward
- 1-A sample of pure t-butyl alcohol weighing 6.22 g was found to have a freezing point of 24.7 °C. When 0.543 g of an unknown compound X was added to the t-butyl alcohol, the mixture had a freezing point of 21.3 °C. Calculate the molar mass of compound X. (Kf = 12.8 °C/molal for t-butyl alcohol.)A sample of pure t-butyl alcohol weighing 6.22 g was found to have a freezing point of 24.7 °C. When 0.543 g of an unknown compound X was added to the t-butyl alcohol, the mixture had a freezing point of 21.3 °C. Calculate the molar mass of compound X. (Kf = 12.8 °C/molal for t-butyl alcohol.) 2-What is the rate law expression for the reaction A + B → C, based on the following dataarrow_forward(CH), the freezing point of the solution is measured to be 3.5 °C. Calculate If you need any additional information on benzene, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 2 significant digits. 0 When 11.5 g of a certain molecular compound X are dissolved in 45. g of benzene the molar mass of X. ロ・ロ X 0x1.2arrow_forwardThe normal freezing point of a certain liquid X is −9.10 °C, but when 8.7 g of potassium bromide (KBr) are dissolved in 100. g of X the solution freezes at - 12.2 °C instead. Use this information to calculate the molal freezing point depression constant K of X. Round your answer to 2 significant digits. K₁ = °C.kg mol x10 Xarrow_forward
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