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coefficient for each reactant
In a balanced chemical equation, the molar ratio of two reactants is determined from the:
All uncombined atoms, Molecules, Moles
In a balanced chemical equation, the coefficients represent the relative numbers of:
In a chemical reaction, the total mass of the products compared to the total mass of the reactants is:
In using balanced equations to solve mass-mass problems, the mass of each reactant is first converted to:
the molar mass of the substance
The number of moles of a reactant or product is determined by dividing its mass by:
grams to moles to moles to grams
In mass-mass problems, the steps to follow are best summarized as going from:
molar ratio of reactants to products
The mass of a reactant or product can be determined by multiplying the number of moles of the substance by the:
An excess of Al and 6.0 mol of Br2 are reacted according to the equation 2Al + 3Br2 -> 2AlBr3
How many moles of ALBr3 will be formed?
In any process, energy is neither created nor destroyed
Which of the following is a statement of the law of conservation of energy?
The energy possessed by objects because of their position or the arrangement of their particles is called:
The amount of products formed in a chemical reaction is determined by the amount of the:
complete a mass-mass problem for each reactant
In a balanced chemical equation, how do you determine the limiting reactant?
The amount of product that should be produced based on stoichiometric calculations is the:
Conservation of Mass
Which concept allows you to relate the coefficients of a balanced chemical equation to actual amounts of reactants or products?
Cl is attached to one H and one H is bonded to another
Which drawing shows the products of a reaction between Hydrogen and Chlorine?
The specific heat capacity
The quantity of heat required to change the temperature of 1g of a Substance by 1C is:
As a ball rolls down a hill, the potential energy _______ and the kinetic energy _________.
The sum of the kinetic and potential energies of all the...in the system is called the:
The quality of the energy of the universe generally decreases
Which of the following statements are true?
The fossil fuel ___ was formed from the remains of plants that were buried and exposed to high pressure and heat over time.
0.450 J/g C
A 5.1G sample of iron is heated from 36 to 75C. The amount of energy required is 89.5J. The specific heat capacity of this sample of iron is:
The Enthalpy Change
At Constant Pressure, the heat absorbed/realeased during a chemical reaction is equal to:
What principle relates the enthalpy change for a net reaction to the enthalpy changes of a series of summed reactions?
1 Calorie = 4.184 Joules
Which of the following is the correct relationship between joules and calories?
If Temperature and Pressure are constant, the volume and number of moles of a gas (Avogadro's Law) are:
It would increase
What would happen to the average kinetic energy of the molecules of a gas sample if the Temperature of the sample increased from 20C to 40C?
Pressure is due to the collisions of the gas particles with the walls of the container
Which of these statements are True about kinetic molecular theory?
What term is used by chemists to quantitatively describe a solution in which a relatively small amount of solute is dissolved?
Gases are weightless near the surface of the earth.
Which of the following is NOT a property of gases?
If the amount and Temperature of a gas are kept constant, the pressure and volume (Boyle's Law) of the gas are:
London Dispersion, Dipole-Dipole, Hydrogen Bonding, Ionic
Order Intermolecular forces from Weakest to Strongest:
Directly proportional (Chapter 13, question 8)
When a sample of a gas is kept at constant pressure, the volume and ____ (Charles's Law) of the gas are:
Temperatures greater than 0C and 1atm or less
The ideal gas law describes the behavior of real gases under:
Its a polar solvent, water is attracted to both anions and cations
Why can water dissolve NaCl, whereas hexane cannot?
grinding the solute into small pieces
The rate at which a SOLID solute can be dissolved in a liquid solvent can be increased by:
Solution will conduct electricity
Which of the following is true for ionic solids dissolved in water?
As the atmospheric pressure around a liquid decreases, the boiling temperature of the liquid:
hydrogen? (Chapter 14, question 9)
An unually strong Dipole-Dipole force that occurs between Hydrogen and Highly electronegative atoms:
H2O-Hydrogen Bonding NaCl-Ionic N2-DipoleDipole
Identify the major attractive force in each of the following molecules:
All; Will resist any change in its [H], solution will not change its pH very much, even if a strong base or concentrated acid is added, Any [H] ions added will react with a conjugate base of a weak acid already in solution
Which of the following is TRUE for a buffered solution?
dissociate in water
The relative strengths of acids are determined by the extent to which the acid particles:
F,O,S & S,O,F
Which of the following exhibits the correct orders for both atomic size and ionization energy, respectively?
have the same number of electrons in their outer energy levels
The elements Chlorine and Iodine have similar chemical properties because they:
When a molecular has a center of positive charge & center of negative charge, it has a:
The energy levels of atoms are ____, meaning that only certain discrete energy levels are allowed
As the principal energy level increases, the average distance of an electron energy level from the nucleus:
Cl?? (Chapter 12, number 11
In an ionic bond, how does a nitrogen atom most commonly achieve an octet of electrons?
An ionic bond is the transfer of electrons and a colvalent bond is the sharing of electrons
how does a covalent bond differ from an ionic bond?
less than 0.5
A bond is classified as Nonpolar covalent if the difference in the electronegativities between two atoms is:
Electron as a wave of quantized energy
The quantum (wave)-mechanical model explains the atom by treating the:
the principal quantum number
The number of sublevels found in each principal energy level of an atom are equal to:
An atom will gain, lose, or share electrons in order to achieve a noble gas configuration. T or F
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