Chem 1311 exam 1 - Study guides, Class notes & Summaries

chemical property correct answersthe way substances may change/react to become another substance physical property correct answerscan be observed without any change to identification and/or composition matter correct answersanything that has mass and occupies space reactivity, stability, flammability, toxicity, fermentation correct answersexamples of chemical properties malleability, ductility, conductivity, viscosity, boiling/melting point correct answersexamples of physical propert...

Chem 1311 Exam 1 - Ch1, 2, 3 (In addition to memorizing polyatomic and monoatomic ions)

CHEM 1311 Exam Questions and Answers All Correct A tentative explanation for a set of observations that can be tested by further experimentation is referred to as - Answer-a hypothesis Identify which of the following are examples of physical properties - Answer--The boiling point of ethanol -The Density of Neon gas -The melting point of gold -The condensation of Steam Give the number of significant figures in each of the following numbers. a. 0. b. 1000. - Answer-6 and 4 The high...

consists of a solute and a solvent. correct answerssolution Substance that dissolves in water to give an electrically conducting solution . correct answerselectrolyte no ions in solution! A substance that dissolves in water to give a poor or non-conducting solution. correct answersnon-electrolyte correct answersstrong acids repeated in a complete ionic equation correct answersspectator ions Arrhenius acid correct answersproduces H+ in solution activity series is used for cor...

CHEM 1311 Exam Questions with All Correct Answers How many significant figures should be retained in the result of the following calculation 12.00000 x 0.9893 + 13.00335 + 0.0107 - Answer-3 of the following, only ________ is an extensive property. - Answer-Volume Iron has a density of 7.9 g/cm3. What is the mass of a cube of iron with the length of one side equal to 55.0 mm? - Answer-1.3 x 10^3 In the following list, only ______ is not an example of a chemical reaction. - Answer-cho...

When a system _____________, change of E is always negative. correct answer: Gives off heat and does work The reaction 4Al(s) + 3O2(g) --> 2Al2O3(s) Delta H = -3351 kJ is ___________, and therefore heat is ___________ by the reaction. correct answer: Exothermic, released Which of the following is a statement of Hess's law? correct answer: If a reaction is carried out in a series of steps, the H∆ for the reaction will equal the sum of the enthalpy changes for the individual steps. ...

How many lone pairs of electrons are on the central element in CCI4? correct answer: 0 Use the VSEPR theory to predict the molecular geometry of nitrogen tribromide, NBr3 correct answer: Trigonal Pyramidal ________hybrid orbitals are used for bonding by Xe in the XeF4 molecule. correct answer: sp^3d^2 Which set of ions are isoelectronic in their ground state electron configuration? correct answer: N^3-, o^2-, Mg^2+, Al^3+ The familiar phenomenon of a rainbow results from the diff...

Hydrogen Bonds correct answer: - Specific type of dipole-dipole interaction - MUST have a H covalently bonded to F O or N Dipole-Dipole correct answer: - Attractions between polar molecules - Weaker than covalent bonds - Stronger the dipole moment, the boiling point gets larger Dispersion Forces correct answer: - Everything has these - Attractions arise from movement - Short-lived interaction; Very weak - Contribute to ALL intermolecular forces London Forces depend on: ...

CHEM 1311 Exam 2 Questions and Answers All Correct NH3 (aq) + HNO3 (aq) = NH4NO3 (aq) is classified as what kind of reaction? - Answer-B) acid-base (produces salt and water) Which solution will be the poorest conductor of electrical current? - Answer-A) Sucrose C12H22O22 1.0 M aqueous solution of the following substances are prepared. Which one would you expect to have the lowest electrical conductivity? - Answer-B) CH3CH2OH (ethanol) which of the following is not a redox reaction? - ...

Chem 1311 Review 1Multiple ChoiceIdentify the choice that best completes the statement or answers the question. ____1.Which of the following statements isincorrect?a.A body in motion possesses kineti c energy becauseof its motion.b.An object possesses potential energy because of itsposition or composition.c.Nuclear energy is an important kind of potentialenergy.d.Chemical reactions and physical changes thatrelease energy to their surroundings areendothermic.e.The Law of Conservation of Matter an...