Chem 103 Study guides, Class notes & Summaries

What color and what type of reaction does Baeyer's test indicate when reacted with a Alkane? STAYs purple NEGATIVE reaction What color and what type of reaction does Baeyer's test indicate when reacted with a Alkene? TURNS red POSTIVE reaction Bromine in CCl4 with Alkane turns the red-orange (NEGATIVE) Bromine in CCl4 with Alkene decolorizes (POSITIVE) Density Mass/ Volumes Beer's law A=ɛbc A=Absorbance Absorbance=2-log(%Transmittance) ɛ= molar absorptivity b= ...

What is the purpose of the litmus paper test? It is used to see if the gas reacts with water to generate an acid or base. How do you test a gas to see if it supports combustion? You use a glowing splint by igniting it, blowing out the flame, and putting the glowing splint on the neck of the bottle as gas is being generated. If the splint glows or pops, then the gas does support combustion. The production of a gas (or gases) demonstrates which kind of change, physical or chemical? Chemical ...

When making observations, what are the things you should describe? smell, appearance, and state of matter of chemicals before and after the reaction, how long the reaction occurred, and names of chemicals What is the density of a substance? The amount of matter contained in a specific sized sample of that substance; mass per unit of volume Will the density of a given substance always be the same despite the volume (as long as the are under the same specific set of conditions)? yes Equat...

What is chemistry? Chemistry is the study of the physical and compositional changes of matter. Chemistry is called the Central Science. Many health related areas of study are based on Chemistry. Matter Matter is anything that has mass, occupies space and is made-up of atoms or parts of atoms. Mass -Mass is a measure of the amount of matter in an object. -Mass is independent of the location of an object. -An object on the earth has the same mass as the same object on the moon, but...

The Law of Definite Proportions states that in a given chemical compound, the elements are always combined in the same proportions by _______________ mass The Law of Conservation of mass states that no detectable gain or loss of mass occurs in chemical reactions. Mass is _______________. conserved Dalton's atomic theory states that matter consists of tiny particles called _____________ atoms Dalton's theory also states that atoms are ____________: in chemical reactions, atoms can rear...

Atoms are made up of protons, neutrons and electrons. The charge on an electron is ____.-1 How many atoms are there in a single molecule of sucrose (C12H22O11)?45 Nitrogen makes _____ bonds3 The geometry about carbon when it makes bonds to four other atoms is ________tetrahedral Which one the following is not an example of a condensation reaction? -The reaction of glucose and fructose to form sucrose. -The reaction of fatty acids and glycerol to form a triglyceride. -The reactio...

Chem 103 Module 6 Exam Questions With 100% Correct Answers calorie (cal) - answerunit of heat or other energy; the amount of energy required to raise 1 gram of water by 1 degree Celsius; 1 cal is defined as 4.184 J endothermic process - answerchemical reaction or physical change that absorbs heat energy - answerthe capacity to supply heat or do work exothermic process - answerchemical reaction or physical change that releases heat joule (J) - answerSI unit of energy; 1 joule is the kineti...

Portage Chemistry Test 4 Exam Questions With 100% Correct Answers Voltaic cell - answergenerate electrical energy through spontaneous chemical reactions Electrolytic cells - answeruses electrical energy to drive nonspontaneous chemical reactions What electrochemical half-reaction occurs at the anode - answerOxidation What electrochemical half-reaction occurs at the cathode - answerReduction Why is the lead-acid battery secondary/storage battery - answerBecause it is rechargeable Why is th...

Chem 103 Polyatomic Ions Exam Questions With 100% Correct Answers Hydroxide - answerOH⁻ Ammonium - answerNH₄⁺ Nitrite - answerNO₂⁻ Nitrate - answerNO₃⁻ Perchlorate - answerClO₄⁻ Chlorate - answerClO₃⁻ Chlorite - answerClO₂⁻ hypochlorite - answerClO⁻ carbonate - answerCO₃²⁻ Hydrogen Carbonate - answerHCO₃⁻

Chem 103: Module 4 Exam Questions And Answers (Verified And Updated) Avogadro's number - answer6.022 x 10^23 atoms = 1 mole 1 u = ___ g - answer1.661 x 10 ^-24 g formula mass - answerthe sum of the average atomic masses of each atom represented in the chemical formula and is expressed in atomic mass units. --The formula mass of a covalent compound is also called the molecular mass. The chemical identity of a substance is defined by - answerthe types and relative numbers of atoms composi...