Which of the following is not true about
purification of drinking water?
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Which of the following is not true about
purification of drinking water?
Question 1 1 pts...
Question 1 (1 point) All of the following statements about bicarbonate ions are true EXCEPT: bicarbonate...
Question 1 (1 point) All of the following statements about bicarbonate ions are true EXCEPT: bicarbonate ions are excreted in the urine in proportion to hydrogen ion excretion. the kidneys are capable of synthesizing new bicarbonate ions. O the kidneys can reabsorb bicarbonate ions. O bicarbonate ions act in a chemical buffer system as a weak base. there is many more bicarbonate ions than carbonic acid molecules in the carbonic acid-bicarbonate buffer system. Question 2 (1 point) Which of these...
21. Of the following choices, which would be a proposed mechanism by which a basic molecule...
21. Of the following choices, which would be a proposed mechanism by which a basic molecule affects an acid solution? a) It prevents the disassociation of H.O molecules therefore raising the pH toward 7.0. b) The base releases OH which can combine with H in the solution, therefore raising the pH toward 70 c) bases are ionic molecules that combine with the polar H,O molecules.) They counteract the burning sensation caused by acids by cooling the cells lining the stomache)...
22 & 23 please QUESTION 22 Which of the following statement(s) about electrolytes are true? 1....
22 & 23 please
QUESTION 22 Which of the following statement(s) about electrolytes are true? 1. Electrolyte solutions conduct electricity because electrons are freely moving through the solution. 2. Electrolyte solutions conduct electricity because ions are moving through the solution 3. When methanol (CH3OH) is dissolved in water, an electrolytic solution results 4. When sulfuric acid acid is dissolved in water, a conducting solution results 5. If an aqueous solution containing sodium chloride is diluted, the conductivity will go down...
1 pts Question 1 Which statement or statements are true about weather and climate? Mark all...
1 pts Question 1 Which statement or statements are true about weather and climate? Mark all that apply. O Weather refers to short-term conditions in the atmosphere. Climate may change from day to day or season to season. Weather is the atmospheric conditions you expect, while the climate is what you actually get each day. O Climate represents an average of atmosphere conditions over a long period of time. 1 pts Question 2 In addition to carbon dioxide, which of...
Which of the following is not true about a water molecule? Select one: a. Contains polar...
Which of the following is not true about a water molecule? Select one: a. Contains polar covalent bonds because oxygen is more electronegative than hydrogen b. Has a bent shape c. Is made up of ions d. Has a permanent dipole, a separation of positive and negative charges Clear my choice
answer 1-4 Which of the following (a-d) is TRUE regarding solid NaCl dissolving in water The...
answer 1-4
Which of the following (a-d) is TRUE regarding solid NaCl dissolving in water The attraction of the water to the ions in NaCl is through dipole-dipole IFs. Water is considered the solute and NaCl the solvent. The partially positive oxygen in water is attracted to the chloride ion. d. The process of separating the sodium ions from the chloride ions is endothermic. All of these statements are true. polar For the following solution, describe the deviation with respect...
Which of the following is a true statement about the Lewis definition of acids and bases? Select the correct answer below: The Lewis definition of acids and bases is based on donating or accepting an electron pair.
Which of the following is a true statement about the Lewis definition of acids and bases? Select the correct answer below: The Lewis definition of acids and bases is based on donating or accepting an electron pair. O The Lewis definition of acids and bases is based on the production of HO or OH ions in water solutions O The Lewis definition of acids and bases is based on donating or accepting a proton. O none of the above MORE...
4.30. Using solubility rules, predict the solubility in water of the following ionic compounds. a. AI(OH) b. CaN...
4.30. Using solubility rules, predict the solubility in water of the following ionic compounds. a. AI(OH) b. CaN C. NH4CI d. KOH 4.32. Using solubility rules, decide whether the following ionic solids are soluble or insoluble in water. If they are soluble, write the chemical equation for dissolving in water and indicate what ions you would expect to be present in solution. (NE SO b. BaCO c. Pb(NOs)2 d. Ca(OH) 4.34. Write net ionic equations for the following molecular equations....
Question 5 1 pts Which of the following is NOT true about the most common scoring...
Question 5 1 pts Which of the following is NOT true about the most common scoring matricies? PAM matricies were derived theoretically from a phylogenetic tree based approach to alignment Larger numbers in PAM matricies are more similar Larger numbers in BLOSSUM matricies are more similar BLOSSUM was derived empirically from known alignments, but without considering a tree
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have...
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have actin, microtubules, and intermediate filaments in their cytoplasm The cytoskeleton provides a rigid and unchangeable structure important for the shape of the cell. The three cytoskeletal filaments perform distinct tasks in the cell and act completely independently of one another Actin filaments and microtubules have an inherent polarity, with a plus end that grows more quickly than the minus end С. D Question 79...
Question 1 (1 point) All of the following statements about bicarbonate ions are true EXCEPT: bicarbonate ions are excreted in the urine in proportion to hydrogen ion excretion. the kidneys are capable of synthesizing new bicarbonate ions. O the kidneys can reabsorb bicarbonate ions. O bicarbonate ions act in a chemical buffer system as a weak base. there is many more bicarbonate ions than carbonic acid molecules in the carbonic acid-bicarbonate buffer system. Question 2 (1 point) Which of these...
21. Of the following choices, which would be a proposed mechanism by which a basic molecule affects an acid solution? a) It prevents the disassociation of H.O molecules therefore raising the pH toward 7.0. b) The base releases OH which can combine with H in the solution, therefore raising the pH toward 70 c) bases are ionic molecules that combine with the polar H,O molecules.) They counteract the burning sensation caused by acids by cooling the cells lining the stomache)...
22 & 23 please
QUESTION 22 Which of the following statement(s) about electrolytes are true? 1. Electrolyte solutions conduct electricity because electrons are freely moving through the solution. 2. Electrolyte solutions conduct electricity because ions are moving through the solution 3. When methanol (CH3OH) is dissolved in water, an electrolytic solution results 4. When sulfuric acid acid is dissolved in water, a conducting solution results 5. If an aqueous solution containing sodium chloride is diluted, the conductivity will go down...
1 pts Question 1 Which statement or statements are true about weather and climate? Mark all that apply. O Weather refers to short-term conditions in the atmosphere. Climate may change from day to day or season to season. Weather is the atmospheric conditions you expect, while the climate is what you actually get each day. O Climate represents an average of atmosphere conditions over a long period of time. 1 pts Question 2 In addition to carbon dioxide, which of...
answer 1-4
Which of the following (a-d) is TRUE regarding solid NaCl dissolving in water The attraction of the water to the ions in NaCl is through dipole-dipole IFs. Water is considered the solute and NaCl the solvent. The partially positive oxygen in water is attracted to the chloride ion. d. The process of separating the sodium ions from the chloride ions is endothermic. All of these statements are true. polar For the following solution, describe the deviation with respect...
Which of the following is a true statement about the Lewis definition of acids and bases? Select the correct answer below: The Lewis definition of acids and bases is based on donating or accepting an electron pair. O The Lewis definition of acids and bases is based on the production of HO or OH ions in water solutions O The Lewis definition of acids and bases is based on donating or accepting a proton. O none of the above MORE...
4.30. Using solubility rules, predict the solubility in water of the following ionic compounds. a. AI(OH) b. CaN C. NH4CI d. KOH 4.32. Using solubility rules, decide whether the following ionic solids are soluble or insoluble in water. If they are soluble, write the chemical equation for dissolving in water and indicate what ions you would expect to be present in solution. (NE SO b. BaCO c. Pb(NOs)2 d. Ca(OH) 4.34. Write net ionic equations for the following molecular equations....
Question 5 1 pts Which of the following is NOT true about the most common scoring matricies? PAM matricies were derived theoretically from a phylogenetic tree based approach to alignment Larger numbers in PAM matricies are more similar Larger numbers in BLOSSUM matricies are more similar BLOSSUM was derived empirically from known alignments, but without considering a tree
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have actin, microtubules, and intermediate filaments in their cytoplasm The cytoskeleton provides a rigid and unchangeable structure important for the shape of the cell. The three cytoskeletal filaments perform distinct tasks in the cell and act completely independently of one another Actin filaments and microtubules have an inherent polarity, with a plus end that grows more quickly than the minus end С. D Question 79...
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