(a )What is a dihydrogen bond? (b) Give an example of a molecule in which a...
(a )What is a dihydrogen bond?
(b) Give an example of a molecule in which a dihydrogen bond is found and briefly describe why it occurs in that case?
(c)The most common hydrogen isotopes are called deuterium (D or 2H) and tritium (T or 3H). Explain how the nucleus of deuterium and tritium differ from that of hydrogen?
(d)Tritium (3H) is radioactive. How is tritium manufactured on a large scale? Include the equation for tritium formation in your answer.
Homework Answers
(a). A dihydrogen bond is a kind of hydrogen bond. It is an interaction between a metal hydride bond and an OH or NH group or other proton donor.In it hydrogen of metal possess partial negative charge while the hydrogen of proton donor possess positive charge. Hence the interaction between these opposite charges are called dihydrogen bond. It is actually not a bond but only a interaction between two different type of hydrogen atoms.
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(a )What is a dihydrogen bond?
(b) Give an example of a molecule in which a...
20) Which statement is NOT true about ionic bonds? A) An ionic bond occurs between positive...
20) Which statement is NOT true about ionic bonds? A) An ionic bond occurs between positive ions and negative ions. B) Electrons are completely lost or gained in ion formation An ion has the same number of electrons as a nonionic atom of the same element. D) A salt such as NaCl is formed by an ionic reaction. 21) Which of the following would be a proposed mechanism by which stomach antacids work? A) Antacids are bases and by definition...
(65 pts) Nuclear Fusiorn (a) What is nuclear fusion ? (b) Give an example (different than...
(65 pts) Nuclear Fusiorn (a) What is nuclear fusion ? (b) Give an example (different than those in this problem below) of a nuclear fusion reaction (c) When a tritium nucleon and a deuterium nucleon under a fusion reaction they produce a helium aucleus and a neutron. If the masses of the species are the following tritium: 3.01605 amu deuterium: 20140 amu helium: 4.00260 amu neutron: 1.0089665 amu How much energy (in kJ) will be produced per mole of reaction...
B) Theories must be testable; hypotheses do not need to be testable. CHypotheses are educated guesses,...
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Which type of bond is the weakest bond between two atoms
21) Which type of bond is the weakest bond between two atoms:A) ionic bondB) covalent bondD) nonpolar bondE) hydrogen bond22) Look at the reaction below, fill in the blank with the correct number in order to balance the reaction:\(6 \mathrm{CO} 2+6 \mathrm{H} 2 \mathrm{O} \rightarrow \mathrm{C} 6 \mathrm{H} 1206+\)A) 2B) 4C) 60223) Which of the following statements below concerning water is not correct?A) composed of polar molecules.B) responsible for most of the mass of humansC) with low heat capacity:D) may...
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons...
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons . Which of the following would have the largest size? a) an atom b) a molecule c) a proton d) a neutron e) an electron 3. Isotopes of an element differ in the number of a) protons in the nucleus b) electrons in the nucleus © neutrons in the nucleus d) electron clouds e) energy levels they contain 4. VO The atomic number represents...
A covalent bond is a bond in which electrons are shared between atoms of elements
A covalent bond is a
bond in which electrons are shared between atoms of elements. A
covalent bond can be polar or nonpolar. In a nonpolar covalent
bond, the bond is between two identical atoms and the electrons are
evenly shared between the atoms.In contrast, in a
polar covalent bond, the bond is between two nonidentical atoms and
the electrons are unevenly shared between the atoms. The uneven
sharing of electrons takes place because of the difference in the
electronegativity...
A 13. (a) Which would have the stronger intermolecular force, CHA or Cla? Briefly explain your...
A 13. (a) Which would have the stronger intermolecular force, CHA or Cla? Briefly explain your answer. V (b) CHa boils at 111 k while Cola boils at 350 K. Does this data support or contradict your answer to part (a)? Briefly explain eng point 14. Why does ethane (CH) have a higher boiling point (184 K) than methane (CH 111 K)? 163 Model III: Another set of boiling point data Substance Boiling point Boiling point HF Substance HO H...
all please 2. Which of the following is an example of posttranslational modification? a. Glycosylation b....
all please
2. Which of the following is an example of posttranslational modification? a. Glycosylation b. Protcolysis c. Palmitoylation d. All of the above 3. The growing polypeptide chain coming off the ribosomal complex is fairly unstable. It has a tendency to fold back on itself and can aggregate with adjacent polypeptides, and these processes, if allowed to occur, would yield degraded, improperly folded, or large aggregates of nonfunctional proteins. How does the cell prevent this from occurring? 4. Transcriptionally...
only one answer per question QUESTION 6 In a DNA molecule, what type of bond helds...
only one answer per question QUESTION 6 In a DNA molecule, what type of bond helds together the two antiparallel strands of nucleotide chains? a peptide bonds. b polar covalent bonds. c ionic bonds. d hydrogen bonds. e complementary base pairing bonds. QUESTION 7 Who proposed the double helix model? a Watson and Crick. b Griffith. c Avery. d Franklin. e Beadle and Tatum. QUESTION 8 Which of the following enzymes removes the primers used for DNA replication? a...
(4) Thermodynamic data suggests that copper monohalides (CuX) should exist as polymers in the gas...
(4) Thermodynamic data suggests that copper monohalides (CuX) should exist as polymers in the gas phaso However, scientists have successfully synthesized CuX monomers and characterized them using microwave spectroscopy For Cu Br the J-13 14,J-1415 and J-1516 transitions occurred at 84421.34 MHz, 90449.25 MHz and 96476.72 MHz, respectively. Assuming Cu Br behaves as a 3D rigid rotor, answer the following questions. Note: Absorption frequency (in units of Hz) of a rotational transition (aka peak position in a microwave spectrum) corresponding...
20) Which statement is NOT true about ionic bonds? A) An ionic bond occurs between positive ions and negative ions. B) Electrons are completely lost or gained in ion formation An ion has the same number of electrons as a nonionic atom of the same element. D) A salt such as NaCl is formed by an ionic reaction. 21) Which of the following would be a proposed mechanism by which stomach antacids work? A) Antacids are bases and by definition...
(65 pts) Nuclear Fusiorn (a) What is nuclear fusion ? (b) Give an example (different than those in this problem below) of a nuclear fusion reaction (c) When a tritium nucleon and a deuterium nucleon under a fusion reaction they produce a helium aucleus and a neutron. If the masses of the species are the following tritium: 3.01605 amu deuterium: 20140 amu helium: 4.00260 amu neutron: 1.0089665 amu How much energy (in kJ) will be produced per mole of reaction...
B) Theories must be testable; hypotheses do not need to be testable. CHypotheses are educated guesses, and theories are tentative explanations. D) Hypotheses are derived from experimentation, whereas theories are derived from observation. 12) A) Water is an example of an element. B Nitrogen C) Glucose D) Salt 13) What are the four most common elements found in living organisms? A) nitrogen, oxygen, phosphorus, and carbon carbon, oxygen, nitrogen, and hydrogen C) carbon, oxygen, potassium, and calcium D) oxygen, calcium,...
The smallest chemical units of matter are atoms b) molecules c) protons d) neutrons e) electrons . Which of the following would have the largest size? a) an atom b) a molecule c) a proton d) a neutron e) an electron 3. Isotopes of an element differ in the number of a) protons in the nucleus b) electrons in the nucleus © neutrons in the nucleus d) electron clouds e) energy levels they contain 4. VO The atomic number represents...
A covalent bond is a
bond in which electrons are shared between atoms of elements. A
covalent bond can be polar or nonpolar. In a nonpolar covalent
bond, the bond is between two identical atoms and the electrons are
evenly shared between the atoms.In contrast, in a
polar covalent bond, the bond is between two nonidentical atoms and
the electrons are unevenly shared between the atoms. The uneven
sharing of electrons takes place because of the difference in the
electronegativity...
A 13. (a) Which would have the stronger intermolecular force, CHA or Cla? Briefly explain your answer. V (b) CHa boils at 111 k while Cola boils at 350 K. Does this data support or contradict your answer to part (a)? Briefly explain eng point 14. Why does ethane (CH) have a higher boiling point (184 K) than methane (CH 111 K)? 163 Model III: Another set of boiling point data Substance Boiling point Boiling point HF Substance HO H...
all please
2. Which of the following is an example of posttranslational modification? a. Glycosylation b. Protcolysis c. Palmitoylation d. All of the above 3. The growing polypeptide chain coming off the ribosomal complex is fairly unstable. It has a tendency to fold back on itself and can aggregate with adjacent polypeptides, and these processes, if allowed to occur, would yield degraded, improperly folded, or large aggregates of nonfunctional proteins. How does the cell prevent this from occurring? 4. Transcriptionally...
(4) Thermodynamic data suggests that copper monohalides (CuX) should exist as polymers in the gas phaso However, scientists have successfully synthesized CuX monomers and characterized them using microwave spectroscopy For Cu Br the J-13 14,J-1415 and J-1516 transitions occurred at 84421.34 MHz, 90449.25 MHz and 96476.72 MHz, respectively. Assuming Cu Br behaves as a 3D rigid rotor, answer the following questions. Note: Absorption frequency (in units of Hz) of a rotational transition (aka peak position in a microwave spectrum) corresponding...
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