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