HEM1 Study guides, Class notes & Summaries

A smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters (depth). What is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm) Select one: A. 1.7 × 105 cm3 B. 34 cm3 C. 58 cm3 D. 3.4 cm3 E. 90 cm3 The correct answer is: 58 cm3 A large pizza has a diameter of 15 inches. Express this diameter in centimeters. (1 in = 2.54 cm) Select one: A. 24 cm B. 18 cm C. 38 cm D. 9.3 cm E. 5.9 cm The correct answer is: 38 cm What is a unifying...

The two states that are collectively known as the condensed states are _______. CORRECT ANSWER solid and liquid The attractive forces that exist between all molecules and atoms, and are the forces that hold many solids and liquids together CORRECT ANSWER intermolecular forces Intermolecular forces are only significant at _____. CORRECT ANSWER short distances The state of a sample of matter is determined by the magnitude of __________. CORRECT ANSWER the intermolecular forces present ...

Question 1 Correct 5.00 points out of 5.00 According to which scientific law does the entropy of the universe increase in spontaneous processes and remain unchanged in equilibrium processes? Select one: A. 1st universal law B. 1st law of entropy C. 2nd law of thermodynamics D. 3rd law of thermodynamics E. 1st law of thermodynamics Straighterline CHEM101 General Chemistry I Graded Exam 4 (New Version June 2024) We are a team of experts offering class attendance for all Straighterline...

Question 1 Correct 5.00 points out of 5.00 Aluminum sulfate, Al2(SO4)3, is used in tanning leather, purifying water, and the manufacture of antiperspirants. Calculate its formula mass. Select one: A. 342.17 amu B. 315.15 amu C. 278.02 amu D. 74.98 amu E. 450.06 amu Question 2 Correct 5.00 points out of 5.00 Calculate the molar mass of sulfuric acid. Select one: A. 98.086 g/mol B. 49 g/mol C. 81.078 g/mol D. 41 g/mol E. None of the answers is correct. Straighterline CHEM101...

1. Question: We discussed the different types of intermolecular forces in this lesson. Which is the strongest in CF2H2 ? 2. Question: Water is such a special molecule with some really unique properties. Why is it so unusual? 3. Question: We discussed the different types of intermolecular forces in this lesson, which can affect the boiling point of a substance. Which of these has the highest boiling point? 4. Question: If you have 2.00 x 103 J of energy, what mass (g) of solid butane (C4H10O) ...

1. Question: Which one of the following is most likely to be an ionic compound? 2. Question: The phosphorus atom in PCl3 would be expected to have a 3. Question: The phosphorus atom in PCl3 would be expected to have a give CH3Cl and hydrogen chloride. 4. Question: How many of the following molecules have no dipole moment? 5. Question: Atoms having equal or nearly equal electronegativities are expected to form 6. Question: Element A has an electronegativity of 0.8 and element B has an electr...

PORTAGE LEARNING CHEM 104 MODULE 1 PORTAGE LEARNING CHEM 104 MODULE 1 PORTAGE LEARNING CHEM 104 MODULE 1

1. Question: A sample of oxygen gas has a volume of 3.52 L at 27°C and 800.0 torr. How many oxygen molecules does it contain? 2. Question: Consider a sample of gas in a container on a comfortable spring day. The Celsius temperature suddenly doubles, and you transfer the gas to a container with twice the volume of the first container. If the original pressure was 12 atm, what is a good estimate for the new pressure? 3. Question: Gas A and gas B are combined in a flask at initial pressures of 1...

1. Question: Dry ice (carbon dioxide) changes from a solid to a gas at –78.5°C. What is this temperature in °F? 2. Question: The state of matter for an object that has both definite volume and definite shape is 3. Question: In 1828, the diameter of the U.S. dime was changed to approximately 18 mm. What is this diameter when expressed in nanometers? 4. Question: A piece of antimony with a mass of 17.41 g is submerged in 46.3 cm3 of water in a graduated cylinder. The water level increases t...

1. Question: What is the volume, in cubic centimeters, of a brick that is 4.0 in × 2.7 in × 8.0 in? 2. Question: A sailor circumnavigated the earth and covered 4,264,000 meters. Express this number in standard scientific notation. 3. Question: The state of matter for an object that has both definite volume and definite shape is 4. Question: How many of the following numbers contain 3 significant figures? 5. Question: In the spring of 2008, gasoline cost £1.029 per Liter in London. On the ...