CHEMISTRY REVIEW EXAM QUESTIONS

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CHEMISTRY REVIEW EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -95 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Ester

Answer:

Organic compounds formed by the reaction of an alcochol with an acid and often have a fruity taste

Question 2: Dipole

Answer:

Created when atoms are joined by a polar covalent bond. The positive end of a dipole in one compound will be attracted to the negative dipole in another compound creating weak attraction between the two compounds.

Question 3: Boyle's Law

Answer:

At constant temperature, and for a given mass of gas, the volume of gas is inversely proportional to the pressure that builds up

Question 4: Catalyst

Answer:

a substance that speeds up a chemical reaction, but itself remains unaltered at the end of the reaction

Question 5: Dispersion Forces

Answer:

Temporary dipole created when moving electrons within an element or compound concentrate themselves on one side of an atom. Usually found in nonpolar covalent compoun

Question 6: Sublimation

Answer:

When a substance changes from a solid to a gas without first becoming a liquid.

Question 7: What is Gamma Radiation

Answer:

High-energy electromagnetic radition that lacks charge and mass. Gamma radiation can be stopped by several feet of concrete or several inches of lead

Question 8: Atom

Answer:

The smallest molecule of an element, a nucleus and its surrounding electrons

Question 9: Convection

Answer:

the exchange of heat energy with the surroundings produced by the flow of a fluid due to being heated or cooled

Question 10: Atomic Weight/ Atomic mass number

Answer:

An average of the masses of each of the iostopes of an element as they occur in mature. (Represents the number of protons and the number of neutrons in an element because electrons essentially have no mass).

Question 11: Single Replacement Reaction

Answer:

Reaction between a more active metal reacting with an ionic compound containing a less active metal to produce a new compound ex. copper wire reacting with aqueous silver nitrate.

Question 12: Ideal Gas Law

Answer:

PV=nRT (n is equal to the number of moles of the substance and R is the gas constant 0.082)

Question 13: Base

Answer:

• produce OH- in solution
• taste bitter
• feel slippery

-conduct electricity

• formulas often contain OH-
• pH is greater than 7

Question 14: Synthesis Reaction

Answer:

Two elements combine to from a product

Question 15: The 5 main types of chemical reactions

Answer:

syntehesis, decomposition, combusion, single replacement, double replacement

Question 16: DIffusion

Answer:

The slow mixing of one substance with another until the two substances are evenly mixed. Moving from high concentration to lower.

Question 17: Molar Mass

Answer:

The mass of one mole of a compound

Question 18: Acid salt

Answer:

An acid salt contains at least one hydrogen ion and can behave as an acid in a chemical reaction. Acid salts are produced under conditions that do not allow the complete neutralization of the acid

Question 19: Halogens

Answer:

Elements of group 7A. Have a charge of -1. Fluorine, Chlorine, Bromine, Iodine. Form compounds with sodium in the form NaX.

Question 20: Absorption

Answer:

the process by which a substance is soaked up

Question 21: Acidic Solution

Answer:

A solution with a pH lower than 7

Question 22: Isotope

Answer:

Atoms with the same number of protons but different numbers of neutrons.

Question 23: Charge of Elements in Group VIIA (7A)

Answer:

-1

Question 24: Homogeneous Mixture

Answer:

Mixture with uniform density throughout and no distinguishable coponents.

Question 25: Heterogenous Mixture

Answer:

Mixture in which the components are readily distinguished.

Question 26: Anion

Answer:

a negatively charged ion