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Questions and Answers
What is Avogadro's number?
What is Avogadro's number?
- The average of atomic masses of all the isotopes of an element.
- The branch of science which deals with the structure of matter, composition of matter, changes of matter and law and principle which govern these changes.
- The formula mass of an ionic substance expressed in gram.
- The number of atoms, molecules, formula units or ions present in one mole of the element, a compound or an ionic substance. (correct)
What is physical chemistry?
What is physical chemistry?
- The branch of chemistry that deals with the properties and reactions of organic compounds.
- The branch of chemistry that deals with the applications of chemical principles to medical sciences.
- One of the major branches of chemistry that deals with the physical principles underlying chemical reactions and transformations. (correct)
- The branch of chemistry that deals with the structure of matter, composition of matter, and changes of matter.
What is empirical formula?
What is empirical formula?
- The formula mass of an ionic substance expressed in gram.
- The atomic mass of an element expressed in grams.
- The formula of a substance which gives the exact number of atoms of each element present in the molecule of a substance.
- The formula of a substance which gives the simple ratio of the elements present in the molecule of a substance. (correct)
What is a gram atom of an element?
What is a gram atom of an element?
What is a heteronuclear diatomic molecule?
What is a heteronuclear diatomic molecule?
What is a homonuclear diatomic molecule?
What is a homonuclear diatomic molecule?
What percentage of the universe is made up of plasma?
What percentage of the universe is made up of plasma?
Who identified plasma in 1979?
Who identified plasma in 1979?
What is the unit of the gas constant in the general gas equation?
What is the unit of the gas constant in the general gas equation?
What is the equation for the density of an ideal gas?
What is the equation for the density of an ideal gas?
According to Dalton's Law of Partial Pressures, what is the expression for PA?
According to Dalton's Law of Partial Pressures, what is the expression for PA?
What is the equation for the compressibility factor of a gas?
What is the equation for the compressibility factor of a gas?
What is the term for atoms of the same element that have the same atomic number but different mass numbers?
What is the term for atoms of the same element that have the same atomic number but different mass numbers?
What is the technique used to separate gas molecules based on their mass to charge ratio?
What is the technique used to separate gas molecules based on their mass to charge ratio?
What type of motion do particles of a solid exhibit?
What type of motion do particles of a solid exhibit?
What is the term for molecules with high molar masses, usually more than 10,000?
What is the term for molecules with high molar masses, usually more than 10,000?
What is the characteristic of interfacial angles of a crystal?
What is the characteristic of interfacial angles of a crystal?
What is the graphical representation of the masses and relative abundances of molecular ions and positively charged fragments?
What is the graphical representation of the masses and relative abundances of molecular ions and positively charged fragments?
What is the term used to describe the phenomenon where a substance exhibits different physical properties in different directions?
What is the term used to describe the phenomenon where a substance exhibits different physical properties in different directions?
What is the term used to describe the phenomenon where an element exists in different physical forms?
What is the term used to describe the phenomenon where an element exists in different physical forms?
What is the term for atoms that have the same number of neutrons?
What is the term for atoms that have the same number of neutrons?
What is the volume of one mole of an ideal gas at standard temperature and pressure?
What is the volume of one mole of an ideal gas at standard temperature and pressure?
What is the minimum information required to define a unit cell?
What is the minimum information required to define a unit cell?
What is the characteristic of the bonds in ionic solids?
What is the characteristic of the bonds in ionic solids?
What is the vacant space in a crystal structure due to the circular shape of atoms and molecules called?
What is the vacant space in a crystal structure due to the circular shape of atoms and molecules called?
Which phenomenon occurs when two different substances exist in the same crystalline form?
Which phenomenon occurs when two different substances exist in the same crystalline form?
What are the dimensions and angles of a unit cell called?
What are the dimensions and angles of a unit cell called?
What is the energy released when one mole of an ionic crystal is formed from gaseous ions?
What is the energy released when one mole of an ionic crystal is formed from gaseous ions?
What is the property of metals that allows them to be converted into thin sheets?
What is the property of metals that allows them to be converted into thin sheets?
What is the force of attraction that binds positive metal ions due to the presence of free electrons?
What is the force of attraction that binds positive metal ions due to the presence of free electrons?
