Concept explainers
(a)
Interpretation::
If milk turns sour, this should be classified as a chemical change or physical change.
Concept Introduction:
In the physical change, the material or substance will not change its chemical identity only changes its physical state like solid into liquid or liquid into gas. For example, water changes its physical sate when ice melts into water.
In the chemical change, the material or substance will change its chemical identity means there is a new substance formed by the formation heat, energy or gas. For example: hydrogen and oxygen react to form water which is a new substance.
(b)
Interpretation::
If wax is melted over a flame catches fire and burns is a chemical change or physical change should be determined.
Concept Introduction:
In the physical change, the material or substance will not change its chemical identity only changes its physical state like solid into liquid or liquid into gas. For example, water changes its physical sate when ice melts into water.
In the chemical change, the material or substance will change its chemical identity means there is a new substance formed by the formation heat, energy or gas. For example: hydrogen and oxygen react to form water which is a new substance.

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Chapter 3 Solutions
INTRODUCTORY CHEMISTRY
- How does the square root mean square velocity of gas molecules vary with temperature? Illustrate this relationship by plotting the square root mean square velocity of N2 molecules as a function of temperature from T=100 K to T=300 K.arrow_forwardDraw product B, indicating what type of reaction occurs. F3C CF3 NH2 Me O .N. + B OMearrow_forwardBenzimidazole E. State its formula. sState the differences in the formula with other benzimidazoles.arrow_forward
- Draw product A, indicating what type of reaction occurs. F3C CN CF3 K2CO3, DMSO, H₂O2 Aarrow_forward19) Which metal is most commonly used in galvanization to protect steel structures from oxidation? Lead a. b. Tin C. Nickel d. Zinc 20) The following molecule is an example of a: R₁ R2- -N-R3 a. Secondary amine b. Secondary amide c. Tertiary amine d. Tertiary amidearrow_forwardpls helparrow_forward
- pls helparrow_forward35) Complete the following equation by drawing the line the structure of the products that are formed. Please note that in some cases more than one product is possible. You must draw all possible products to recive full marks! a. ethanol + 2-propanol + H2SO4 → b. OH conc. H2SO4 CH2 H3C CH + K2Cr2O7 C. d. H3C A pressure CH3 + H2 CH Pt catalystarrow_forward21) The rate of reaction depends upon: a. the concentration and nature of reactants b. the temperature of the reaction C. whether or not a catalyst was used d. all of the above 22) A Maxwell-Boltzmann curve shows the distribution of molecular energies in a reaction system. When the temperature in this system is increased, the peak is a. higher and further to the right. b. higher and further to the left. c. lower and further to the right. d. lower and further to the left. 23) Which of the following correctly describes the reaction represented by the reaction below? CaCO3 (s) + energy → CaO (s) + CO2 (g) a. It is exothermic and the potential energy is greater in the reactants than the products. b. c. It is exothermic and the potential energy is greater in the products than the reactants. It is endothermic and the potential energy is greater in the products than the reactants. d. It is endothermic and the potential energy is equal for the products and reactants.arrow_forward
- Introductory Chemistry: A FoundationChemistryISBN:9781337399425Author:Steven S. Zumdahl, Donald J. DeCostePublisher:Cengage LearningGeneral Chemistry - Standalone book (MindTap Cour...ChemistryISBN:9781305580343Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; DarrellPublisher:Cengage Learning

