FREE AND STUDY GAMES ABOUT CHEMISTRY SE EXAM

PDF Download

FREE AND STUDY GAMES ABOUT CHEMISTRY SE EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -54 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: 18. Water has a higher boiling point than acetone does. Which of the following statements about water and acetone in the liquid state must be true?

Answer:

The attractions between particles in water are greater than those in acetone.Question 2: 46. Based on the molecular structures of chloromethane and methane shown, a student makes the claim that a pure sample of chloromethane has stronger...(too long)...Which of the following statements correctly uses reasoning to support the student's claim?

Answer:

Chloromethane has a polar C-Cl bond, which allows for dipole-dipole interactions, but methane is nonpolar and only experiences dispersion forces.Question 3: 27. Small pieces of copper at 100.0°C are placed in 110.0g of water at 25.0°C in a perfectly insulated calorimeter...(too long)... The heat capacity of water is 4.18J/(g?°C) . How much heat is transferred during the experiment?

Answer:

920 J

Question 4: 37. Molecules of hydrogen chloride (HCl) are shown in diagram X and diagram Y . Which of the following describes which diagram shows attractive forces, and why?

Answer:

Diagram X , because the dashed lines show that the positive end of one molecule is attracted to the negative end of an adjacent molecule.Question 5: 17. Which of the following statements correctly identifies the energy transfer that takes place as the change represented by the model occurs?

Answer:

The process is endothermic; energy is added to the system as the change occurs.Question 6: 47. A student claims that the molecule represented in the diagram is nonpolar, so the substance has only London dispersion forces. Which of the following is the best evaluation of the student's claim?

Answer:

The claim is incorrect; the geometry is tetrahedral and there are two different types of atoms around the C atom, so the dipoles do not cancel.Question 7: 12. A student determines the mass and volume of several pieces of the same metal...(too long)...The student plots the data, as shown on the graph. The density of the metal is closest to which of the following?

Answer:

2.7 g/mL Question 8: 1. Which of the following particle diagrams correctly represents the states of matter that exist at points A and B on the phase diagram?

Answer:

C Question 9: 35. A solution is made by dissolving solid sucrose in water. The solution is heated gently until all of the water evaporates. The following data are collected. Which of the following can be concluded from the results of the experiment?

Answer:

The solution contained 81.07g of water.

Question 10: 54. Consider the following Lewis diagrams of three hydrocarbons. Identify which compounds are structural isomers.

Answer:

B and C Question 11: 45. The Lewis diagram of ethanol, an alcohol, is shown. Is this a polar or non polar molecule.

Answer:

Polar Question 12: 14. A student creates the following particulate view of the water particles in a tank used for the classroom frogs...(too long)... Which of the following best represents the distribution of water particles in the tank after the increase in temperature?

Answer:

C Question 13: 8. A student has drawn this model and says it shows what happens when a liquid changes to a gas. The diagram can best be used to illustrate which of the following?

Answer:

The density of a gas is less than that of a liquid.Question 14: 31. The diagram represents a sample that contains atoms of two different elements. Which of the following best describes the sample?

Answer:

It is a mixture of two elements.Question 15: 36. A student claims that intermolecular forces are overcome when water boils, but intramolecular forces are not. Which of the following particle diagrams can be used to support the claim?

Answer:

Option 4 Question 16: 33. Consider the models shown. Choose the phrase that best describes each model respectively.

Answer:

atom and molecule

Question 17: 13. A student determines the mass and volume of several pieces of the same metal...(too long)...Which of the following pieces of glassware should the student use to determine the volume of the metal samples?

Answer:

B Question 18: 52. Which of the following particle diagrams best represents the compound sulfur dioxide ( SO2 )?

Answer:

Option 3 Question 19: 4. The figure represents a solid block of copper metal in a beaker at 30°C . Which of the following best represents the particle arrangement as a student tips the beaker, which is kept at 30°C ?

Answer:

C Question 20: 43. A chemist uses distillation to remove..(too long)...If the total pressure of the gas sample is 1.0atm , the partial pressure of H2O(g) in the gas sample produced is predicted to be closest to which of the following?

Answer:

0.10 atm Question 21: 53. Identify the molecular geometry around the carbon atoms in compound A labeled 1 and 2 by matching the correct molecular geometry with each labeled carbon atom.

Answer:

trigonal planar and tetrahedral Question 22: 7.The particle diagram represents a sample of helium in a sealed container at constant volume. Which particle diagram represents the same sample after heating, and what is the correct justification for that choice?

Answer:

Diagram Y represents the gas sample at a higher temperature because the particles have a higher average speed when heated.