Chem 101 Study guides, Class notes & Summaries

Question 1 Which of the following setups would convert centimeters to feet? A) cm × × B) cm × × C) cm × × D) cm × × Question 2 The distance between carbon atoms in ethylene is 134 picometers. Which of the following expresses that distance in meters? A. 1.34 × 10–13 m B. 1.34 × 10–12 m C. 1.34 × 10–10 m D. 1.34 × 10–7 m 3 | P a g e Question 3 A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concent...

Which of these compounds is a weak electrolyte? Select one: a. HCl b. NH3 c. C6H12O6 (glucose) d. N2 e. KCl Question 2 Correct 4.60 points out of 4.60 Remove flag Question text What volume of water must be added to 300 mL of 0.75 M HCl to dilute the solution to 0.25 M? Select one: a. 900 mL b. 600 mL c. 300 mL d. 930 mL e. 100 mL Question 3 Correct 4.60 points out of 4.60 Flag question Question text The substance HClO4 is considered to be Select one: a. a weak acid. b...

Consider the following four solutions:  NaCl in water  Acetic acid in water  Acetic acid in benzene  Naphthalene in benzene Which of these solutions has the strongest solute-solvent interactions and the interaction is of which type? Select one: a. Acetic acid in water; hydrogen bonding b. Acetic acid in benzene; dipole-induced dipole interaction c. NaCl in water; ion-dipole interaction d. Naphthalene in benzene; London Dispersion Forces e. NaCl in water; hydrogen bonding ...

Module Two Chem 101 Problems Exam Questions And Answers 100% Solved 2024 Carbon dioxide is a _____ compound composed two types of _____ atoms. A. Molecular, metal B. ionic, metalloid C. molecular, nonmetal D. ionic, metal - answerC. molecular, nonmetal Carbon dioxide is a molecular compound composed of two oxygen atoms with covalent double bonds to a central carbon atom. Both C and O are to the right of the "staircase" on the periodic table, as nonmetals. Classify the following compo...

Which of the following is a tentative explanation for a set of observations? Select one: a. Law b. Hypothesis c. Theory d. Phenomena e. Prediction Question 2 Correct 4.60 points out of 4.60 Flag question Question text Which of the following cannot be separated into simpler substances by chemical means? Select one: a. Element b. Emulsion c. Compound d. Homogeneous mixture e. Heterogeneous mixture Question 3 Correct 4.60 points out of 4.60 Flag question Question text Which ...

STRAIGHTERLINE CHEM 101 GENERAL CHEMISTRY GRADED EXAM 6 2023 What is ΔS° for the following reaction? SiCl4(g) + 2Mg(s) → 2MgCl2(s) + Si(s) Substance SiCl4(g) Mg(s) MgCl2(s) Si(s) S°(J/K • mol) 330.73 32.68 89.62 18.83 Question text A spontaneous endothermic reaction always Select one: b. bursts into flame. c. requires a spark to initiate it. d. releases heat to the surroundings. Ozone (O3) in the atmosphere can react with ni...

Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3 . What is the radius of a platinumSelect one: a. 69 pm b. 98 pm c. 139 pm d. 196 pm e. 277 pm Question 2 Correct 4.60 points out of 4.60 Flag question Question text Helium atoms do not combine to form He2 molecules, yet He atoms do attract one another weakly through Select one: a. dipole-dipole forces. b. ion-dipole forces. c. dispersion forces. d. dipole-induced dipole forces. e. hydrogen bonding....

Which of the following activities is not a part of good science? Select one: a. Proposing a theory b. Developing a hypothesis c. Making quantitative observations d. Designing experiments e. Indulging in speculation Question 2 Correct 4.60 points out of 4.60 Flag question Question text What is a unifying principle that explains a body of experimental observations? Select one: a. Law b. Hypothesis c. Theory d. Phenomena e. Prediction Question 3 Correct 4.60 points out of 4.60 ...

QUESTIONS AND ANSWERS

Chem 101 Final Exam Questions And Answers 100% Solved Determine the formula weight of KBr - answer119.00 amu Determine the mass in grams of 3.00 x 10^21 atoms of arsenic. (The mass of one mole of arsenic is 74.92 g.) - answer0.373 g Fill in the blank: A mole is defined as the number of carbon atoms in _____ g of pure ^12C. - answer12 How many atoms are in 1.2 mol of carbon? - answer7.2264 x 10^23 Which one of the following contains the most moles of oxygen atoms? A) 1 mol of Fe(C2H3O2)3...