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Res 200 unit 4 exam

QuestionAnswer
What is the empirical formula for magnesium oxide? MgO
Select any factors below that can influence the rate of a chemical reaction? I, II, and III only • I. Concentration of reactants •II. Temperature •III. Catalysts
Because alcohol can act as a __________ after its ingestion, ______________ can result. vasodilator, hypothermia
It can be stated that during covalent bonding the bond that is formed results from the formation of oppositely charged ions. False
From the statements below select the one that best describes the atomic number? The sum total of the number of protons in the atom's nucleus
What is the empirical formula for magnesium bromide? MgBr2
Ionization describes the process of atoms that lose or gain electrons in an effort to complete their outer shells. True
True or False: The correct formula for calcium chloride is CaCl2 True
Without the increase in reaction rate caused by the catlysts known as digestive ___________, it would take each of us 50 years to digest a single meal. enzymes
In order to complete an octet in their outermost energy level when forming a chemical bond, atoms will _____________________. I, II, and IV only •I. gain electrons• II. lose electrons •IV. share electrons
How many electrons are needed in the 3rd Energy Level for the element Mg? •Energy Level 1 = 2 •Energy Level 2=8 •Energy Level 3 = ? 2
The octet rule for the above fluorine molecule is complete: True
Which of the following are considered polyatomic ions? I. HCO3- II. SO42- III. NaF IV. CN- I, II, and IV only I. HCO3- II. SO42- IV. CN-
True or False: The correct name for Mg(OH)2 is magnesium hydroxide True
What is the empirical formula for sodium chloride? NaCl
The oxygen molecule (O2) is formed through ____________ bonding. pure covalent
If you have 3.612 x 1023 molecules of a substance, how many moles would you have? 0.6 moles
A compound can be described as __________________________ two or more elements joined together by a chemical bond.
Catalysts can increase the rate of a reaction by ____________. decreasing the activation energy
The minimum energy required for a reaction to occur is called the activation energy. True
Determine the compound formed when bonding occurs between the following atoms? KCl
Which type of bonding involves the sharing of electrons between atoms? Covalent
Which element has the following electron configuration? •Energy Level 1 = 2 •Energy Level 2 = 8 •Energy Level 3 = 7 Cl
The mass number of an atom can be described as _____________________. the sum of the protons and neutrons in the nucleus.
Created by: Cam1228