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Concept explainers
(a)
Interpretation:
Rusting of an iron nail has to be labelled as either a physical change or a
Concept Introduction:
Physical change:
A change in which no new substances are formed is said to be physical change. It affects the chemical substance but not its composition.
Chemical reaction:
It is a process that involves rearrangement of the molecular or ionic structure of a substance. In this, one or more chemicals reacts and forms other chemical compounds.
(b)
Interpretation:
Melting of an ice cube has to be labelled as either a physical change or chemical reaction.
Concept Introduction:
Refer to part (a).
(c)
Interpretation:
Falling of a limb from tree has to be labelled as either a physical change or a chemical reaction.
Concept Introduction:
Refer to part (a).
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Chapter 1 Solutions
General, Organic, and Biochemistry
- Calculate the reaction quotient for the reaction:NaOH (s) ⇌ Na+ (aq)+ OH- (aq) + 44.4 kJ [Na+] = 4.22 M [OH-] = 6.41 Marrow_forwardGiven the following concentrations for a system, calculate the value for the reaction quotient: Cl2(g)+ CS2(g) ⇌ CCl4(g)+ S2Cl2(g) Cl2 = 31.1 atm CS2 = 91.2 atm CCl4 = 2.12 atm S2Cl2 = 10.4 atmarrow_forwardMatch each chemical or item with the proper disposal or cleanup mwthod, Not all disposal and cleanup methods will be labeled. Metal sheets C, calcium, choroide solutions part A, damp metal pieces Part B, volumetric flask part A. a.Return to correct lables”drying out breaker. Place used items in the drawer.: Rinse with deionized water, dry as best you can, return to instructor. Return used material to the instructor.: Pour down the sink with planty of running water.: f.Pour into aqueous waste container. g.Places used items in garbage.arrow_forward
- Write the equilibrium constant expression for the following reaction: HNO2(aq) + H2O(l) ⇌ H3O+(aq) + NO2-(aq)arrow_forwardWrite the reaction quotient for: Pb2+(aq) + 2 Cl- (aq) ⇌ PbCl2(s)arrow_forwardWrite the equilibrium constant expression for the following system at equilibrium: I2 (g) ⇌ 2 I (g)arrow_forward
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