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The study of the structure, properties, composition, reactions, and preparation of carbon-containing compounds.
The difference between the colligative properties of electrolyte and nonelectrolyte solutions is the breaking up of solute particles in a solution. This is quantified and added to computation of concentration units using the:
This concept was developed after a French Chemist, Claude Louis Berthollet (1803) found that some chemical reactions are reversible.
True or False: Alpha emissions result in the release of gamma rays.
Which of the following group of elements are Lewis structures not applicable?
What is the subshell notation for quantum numbers n=3 and l=2?
Solubilities of solids and gases affect differently with temperature.
The boiling-point temperature of a solution is higher than its pure solvent.
Which of the following is not an exception to the octet rule?
Which of the following statement is true regarding Tyndall effect?
The f-subshells of transition metals are incompletely filled.
_____________ refers to a measure of how closely individual measurements are to the actual or true value, while _______________ refers as to how closely individual measurements are to each other.
It is defined as the values of all relevant microscopic properties.
When ΔS > 0 and ΔH > 0, the process will be ___________________ at high temperatures.
How many significant figures are in 5.070 x 103 g?
Which of the following can increase the pressure of a gas?
Accuracy is a measure of how closely individual measurements are to the actual or true value, while precision refers as to how closely individual measurements are to one another.
One mole of N2 contains 2*6.022 x 1023 molecules.
AB4+2C2->AC2+2B2C. If 100 grams of AB4 reacts with excess of C2, it will produce 100 grams of AC2.
The solubility of a sodium chloride in water at 25 degrees Celsius is 357g/L. What is the molar solubility of NaCl?
Using the periodic table, which element is in Group 4A period 6?
Which of the following is TRUE?
How does temperature affect rate constants?
What theory explains that when certain metals are exposed to light of at least a certain minimum frequency, electrons are ejected from its surface.
Which of the following statements is false?
During a chemical reaction, the concentration of the reacting species increase over time while it is being consumed.
Amphoteric property is defined as the ability of a compound to function as a base or as an acid, depending on the solution.
As the mass or speed increases, kinetic energy decreases.
From the given pairs, determine which pair is the anode.
Which of the following affects chemical equilibrium?
What is an induced dipole moment?
Which of the following is the reaction intermediate?
It is the quantity of space being occupied by matter.
True or False: Electron capture decay results in the decrease in the atomic number.
Given the following equation, write and compute for the equilibrium constant expression:
Which of the following describes the relation between reactant concentration and time in the following equation?
For the given reaction mechanism, NO3 is one of the final products.
Using the periodic table, which element is in Group 2A period 5?
What happens during a chemical equilibrium?
It is defined as the measurement of disorder or randomness within the system
Which of the following are correct match of molecular and empirical formula?
Aluminum oxide, Al2O3, is synthesized by the reaction of aluminum, Al, and oxygen gas, O2. Which of the following equations correctly represent the reaction?
At 25°C, in an acidic condition, Kw will always be less than 1.0×10-14.
What traits can be observed with solids and liquids, due to little space in between molecules?
What are the forces observed in capillary action:
Molar heat capacity is the amount of heat needed to raise the temperature of 1 mole of a substance by 1K or one degree celsius.
Convert 35.6 degrees Celsius to Fahrenheit
Chemical equilibrium is the state in which there is no apparent change in the products and reactants over time, and the free energy of the reaction is at its lowest.
Which of the following has the highest ionization energy?
The energy of a single photon is described as E = hv
What is a supersaturated solution?
Dalton's law of partial pressure states that constant _____________ and volume, the total pressure of a gas is directly proportional to the number of moles of gas present.
Energy levels of orbitals determine the actual arrangement of electrons in atoms. Electrons will fill first the most stable orbitals.
What is the mass percent of Hydrogen, H, in resveratrol?
Which of the following statement is true?
The differential rate law expresses how the reaction depends on concentration while integrated rate law expresses how concentration depends on temperature.
Elements are arranged in the periodic table in order of increasing atomic number.
Which of the following is an exception to the octet rule?
How many grams are in 6.20 moles of Na?
When ΔS > 0 and ΔH < 0, the process is _________________________.
True or False: Beta emission results in the formation of an element with 1 additional neutron
Compute the area given the following measurements: 2.0546 cm and 4.3 cm. Express the answer in significant figures.
Which of the following concentration units is NOT independent of temperature?
Compute for the area of the a rectangle, with the correct answer in significant figures.
Determine each nuclear transmutation :
It is the sum of internal energy and the product of pressure and the change in volume of the system under constant pressure
Which state of matter has a definite volume and shape?
Which of the following rules is true with regards to assigning maximum number of electrons to orbitals (given n)?
Which of the following describes the energy and 3-dimensional regions around the nucleus where an electron can be found?
What is defined as the amount of heat needed to raise the temperature of 1gram of the substance by 1K or 1C?
The stronger the intermolecular forces, the higher the surface tension.
A 0.10 M Benzoic acid is prepared in water at 25°C. Calculate the concentration of the acid and conjugate base, benzoate, in the solution at equilibrium. (Ka = 6.3×10-5)
Determine if the transformation is an Oxidation, Reduction or Neither :
______________ are elements located in rows, while ________ are elements located in columns
A unit of measure of temperature based upon an absolute scale
It is a type of system that cannot transfer both mass and energy
Why can glass be filled slightly above the rim with water without overflowing?
Calculate the pH of the buffer solutions below:
Among the states of matter it has the lowest entropy.
During a chemical reaction, what happens to the concentration of the reactants?
Which ion is not correctly named?
Changes in concentration, temperature, pressure, and time are important factors to consider in chemical equilibrium.
Please mark the correct answer If the Ka of acetic acid is 1.8x10-5 and the pH of the buffer is 5.50, what are the concentrations of acetic acid and acetate?
Elements can be decomposed into smaller substances.
Defined as the thermodynamic potential that can be used to calculate the maximum of reversible work that may be performed by a thermodynamic system at a constant temperature and pressure
Determine each nuclear transmutation
A melting ice is an example of the first law of thermodynamics.
The magnetic quantum number describes the size of the orbital. It also indirectly describes the energy of an orbital.
Which of the following has the greatest electron affinity?
What is the relationship between polarizability and intermolecular forces?
This refers to the capacity of an atom to attract electrons to itself.
It would be impossible to perform work that results in an energy output greater than the energy input.
What is the relationship between intermolecular forces and surface tension?
Valence electrons are also known as the innermost electrons.
Which of the following rules is not true with regards to assigning maximum number of electrons to orbitals (given n)?
The number of electrons and protons are equal in number.
Consider the reaction below
This refers toa process where molecules of a solvent pass through a semipermeable membrane:
Please mark the correct answer
We cannot write Lewis symbols for what group of elements?
Henderson-Hasselbalch equation s the equation relating between pH and pKa.
Molecules in gases, under normal conditions, is observed to:
Given the percent composition by mass of all the elements in an unknown compound, we can always determine its molecular formula.
Which of the following best describes the Le Chatelier's Principle?
Direction : Identify if the following elements are metal, non-metal or metalloids:
Compute for the work done if the change in internal energy is equals to 500J while giving off 350J of heat.
In the following chemical reaction, what can be done to maintain the forward reaction?
According to the kinetic molecular theory, average kinetic energy of gas molecules is proportional to absolute temperature. At any given temperature, gas molecules have exactly similar average kinetic energy.
Dalton's law of partial pressure states that constant temperature and volume, the total pressure of a gas is ____________ proportional to the number of moles of gas present.
Determine if the Starting Material underwent the following changes upon formation of their respective decay product nuclei:
In order for a given exothermic chemical reaction to proceed, heat must be supplied for the molecules to collide.
He was the first to formulate a concise definition of thermodynamics in 1854 which stated, "Thermo-dynamics is the subject of the relation of heat to forces acting between contiguous parts of bodies, and the relation of heat to electrical agency.
It is the specific part of the universe that is involved in the chemical process.
Which of the following is true for ionic bond formation?
The percent composition by mass of ferrous sulfide, FeS, is 50% Fe and 50% S.
It is a state function defined as the ability to do work
Transitioning of a particular substance from liquid phase to its gaseous phase is called?
Choose the pair that will serve as the cathode
What is the collective term for forces that attracts molecules together?
Which of the following is NOT a type of concentration unit?
Explain the relationship between the number of bonds and the distance between bonded molecules.
Why can't we write Lewis structures for lanthanides, actinides, and transition metals?
What is the name of the compound that has 2 nitrogen and 4 oxygen?
The difference between the mass number and the atomic number equals the number of ________________ in an atom.
This is a method used to distinguish a solution from a colloid, where light is beamed in a substance and observed if it would scatter due to dispersed particles observable in a colloid:
Group IA elements have the lowest ionization energies.
A percent yield of 100% is impossible to attain in the laboratory.
Supersaturated solutions contain more than the maximum amount of solvent in a solution.
If 2 moles of AB4were made to react with 2 moles of C2, 1 moles of AC2 will be produced.
During a chemical equilibrium, concentrations of products and reactants no longer have apparent change.
Suppose synthesis of Al2O3 is done in the lab using 20.50 g of Al and excess of O2. Upon purification, 35.48 grams of Al2O3 is produced. What is the percent yield of Al2O3?
It is a type of system that can transfer both mass and energy with its surroundings
Which of the following is a characteristic of a buffer?
According to the quantum theory, energy is always expressed in integral multiples.
Compute the change of internal energy of a certain process in which 3000 J of heat is added to a system while the system does work equivalent to 6000 J by expanding against the surrounding atmosphere.
We can write Lewis symbols for what group of elements?
At constant temperature and volume, the total pressure of a gas is ___________ proportional to the number of moles of gas present.
Which of the following statements is true with regard to the relationship of lattice energy with the atoms' charges and the distance between them?
Due to little space in between molecules, solids and liquids lack shapes and volume.
One mole of Phosphorus, with atomic mass of 30.97 amu, has greater number of atoms than one mole of Boron, with atomic mass of 10.81 amu.
In a balanced chemical equation, the number of atoms of an element on the left side is always equal to the number of atoms on the right side.
This type of bond happens when an electron from an atom transfers to another atom, forming ions and creating electrostatic attraction:
True or False: The number of neutrons determines the identity of the element.
Which of the following statement is correct?
It is the sum of the potential and kinetic energy in the system.
Which of the following are characteristics of gases?
Partial pressure is defined as the amount of pressure exerted by each component gas in a mixture, which is independent of the pressure exerted by the other gases.
It is the process capable of proceeding in a given direction without the help of outside energy
When does a chemical equilibrium occur?
Positive ΔH means that heat is lost from the system into its surroundings, while negative enthalpy ΔH means that heat is absorbed by the system from its surroundings
If the percent yield of the reaction is only 85% using 100.0 kg of ammonia.
In the following reaction, which happens first? 2NO(g) → N2O2(g)
What factor affects the polarizability of a certain nonpolar molecule?
Which of the following quantum numbers describes the orientation of the orbitals?
What is the rate law of the second step?
The following model explains how the temperature affects the rate constants of a chemical reaction:
Collision Model explains which of the following conditions:
_____________ measures the randomness within a system.
The freezing-point temperature of a solution is lower as compared to its pure solvent.
Naproxen sodium, C14H13NaO3, is an anti-inflammatory drug used to relieve pain and swelling. It has a molar mass of 252.245 g/mol. It is usually sold in tablet form, containing 550.00 mg of the active. How many moles of naproxen sodium are in a tablet?
Atomic number plus the number of neutrons is referred to as:
Given the following concentrations for the decomposition of NO2 compute for the rate of the reaction in terms of the reactant, NO2.
It is the state function that measures the “hotness” or “coldness” of a substance
What are the types of systems
Increasing the temperature also speeds up the reaction, hence, increasing the rate constants
True or False: Uranium-235 and Plutonium-235 are isotopes
What traits can be observed with gases, due to the large amount of space in between molecules and the lack of interaction between them?
Which of the following statement is true regarding balancing chemical equations?
It is also called as the Nernst's Theorem.
The -ium ending on the name of hydronium indicates that it is a cation from metal atoms.
A homogeneous catalysis occurs using a catalyst that has a different phase as the reacting molecules while a heterogeneous catalysis occurs when a catalyst has the same phase as the reactants.
What can affect the viscosity of a certain liquid?
What is the relationship between solubility of solids and temperature?
Which of the following statement is true regarding Boh's Theory of the Hydrogen Atom?
What factor affect electronegativity?
It is the study of the energy and heat associated with chemical reactions and physical transformations.
The electron configuration influences the properties of the elements.
The main difference between the condensed states and the gaseous state of matter is the distance between molecules.
The direction of the reaction favored when stress is applied is towards the direction where the stress is lessened.
Which of the following statement is true regarding Ideal Gas Law?
Equivalence point is the point in acid-base titration where the concentration of the acid is equal to the concentration of the base.
Differential Rate Law expresses how the reaction rate depends on the concentration while the Integrated Rate Law expresses how the concentrations depend on time.
Colligative properties depend on the nature of the substances in a solution.
Gases take up volume and shape of its container, are considered the least compressible state of matter and have the lowest density compared to solids and liquids.
Which of the following is the correct formula of sulfurous acid?
Charle's Law states that at a constant pressure, the volume of a fixed amount of gas is inversely proportional to its absolute temperature
Which of the following has the highest atomic radii?
The lack of molecules above the surface of liquids causes them to tighten and form an elastic-like film.
How many significant figures are in 0.000187?
Concentration of reactants is reduced over the course of reaction.
Which of the following is true about d orbitals?
Which of the following statement is true regarding matter?
Calculate the pH at the equivalence point when 15.0 ml of 0.200 M HCl is titrated with 0.200 M NH3.
Why do some covalently bonded molecules turn out to be bipolar?
Iron, Fe, has an atomic mass of 55.85 amu therefore, the molar mass of Fe is 55.85 g/mol.
Which of the following statement is true regarding Gas Laws?
Explain the relationship with bond enthalpy and the number of bonds.
Ideal Gas Law is expressed as PV=nRT.
It is the type of system that can transfer energy but not mass to its surroundings.
What is the mass number of an atom that has 5 protons, 5 electrons and 6 neutrons?
It states that the entropy of a system approaches a constant value as the temperature approaches zero.
What is the mass number of an atom that has 2 protons, 2 electrons and 4 neutrons?
Determine the oxidation state of the mentioned element in the given compound :
Which of the following statement is not true according to Dalton's atomic theory ?
Pressure is defined as the effect of a force applied to a surface and can be measured by means of a barometer or manometer.
How many atoms are in 3.50 moles of Ni?
As long as we use stoichiometric amounts of reactants in a reaction carried out in the laboratory, we are guaranteed to get the theoretical yield of the reaction.
Effective nuclear charge is the nuclear charge felt by an electron when both the actual nuclear charge and the repulsive effects of the other electrons are taken into account.
When a car rolls down from a hill, ___________________ increases?
What is the difference between homogeneous and heterogeneous catalysis?
Le Chatelier's principle states that if stress (or a change in condition) is imposed on a system at equilibrium, the equilibrium position shifts to a direction that tends to lessen the stress.
Ammonia, NH3, is a clear, colorless gas with a pungent smell produced by the reaction of hydrogen gas, H2 and nitrogen gas, N2. Which of the following chemical equation best represent this reaction?
He was a German physicist and a mathematician and one of the crucial founder of thermodynamics stated that heat by itself cannot pass from a colder to a hotter body
Chemical equilibrium is the state at which the free energy of the reaction is at its highest possible value.
How many moles of Al is needed to produce 4 moles of Al2O3
It is the properties that are determined by the state of a system regardless of how that condition was achieved.
Which of the following statement is true regarding atoms?
It is the sum of potential and kinetic energy in a system.
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