In a single molecule of water, 2 hydrogen atoms room bonded to a solitary oxygen atom by A) hydrogen bonds. B) nonpolar covalent bonds. C) polar covalent bonds. D) ionic bonds. E) valve der Waals interactions.
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The slight an adverse charge in ~ one finish of one water molecule is attracted to the slight hopeful charge of another water molecule. What is this attraction called? A) a covalent bond B) a hydrogen link C) an ionic shortcut D) a hydrophilic bond E) a valve der Waals interaction
The partial an unfavorable charge in a molecule of water occurs since A) the oxygen atom acquires an additional electron. B) the electron shared in between the oxygen and hydrogen atom spend much more time about the oxygen atom nucleus than roughly the hydrogen atom nucleus. C) the oxygen atom has actually two bag of electron in the valence shell that room not neutralized by hydrogen atoms. D) the oxygen atom creates hybrid orbitals the distribute electron unequally about the oxygen nucleus. E) one of the hydrogen atoms donates an electron to the oxygen atom.
Sulfur is in the same obelisk of the regular table together oxygen, but has electronegativity similar to carbon. Contrasted to water molecules, molecules of H₂S A) will ionize much more readily. B) will have higher cohesion to other molecules the H₂S. C) will have a greater propensity to type hydrogen bonds with each other. D) will have a higher capacity come absorb warmth for the same readjust in temperature. E) will not kind hydrogen bonds v each other.
Water molecules are able to form hydrogen bonds through A) compounds that have actually polar covalent bonds. B) oils. C) oxygen gas (O₂) molecules. D) chloride ions. E) any compound the is no soluble in water.
Which of the following impacts is created by the high surface stress and anxiety of water? A) Lakes don"t freeze solid in winter, regardless of low temperatures. B) A water strider can walk across the surface of a little pond. C) Organisms withstand temperature changes, return they provide off heat as result of chemical reactions. D) Evaporation of sweat from the skin help to keep people from overheating. E) Water flows upward from the roots to the leaves in plants.
Which that the adhering to takes ar as an ice cube cools a drink? A) molecular collisions in the drink increase. B) Kinetic power in the drink decreases.C) A calorie of heat power is moved from the ice cream to the water that the drink. D) The specific heat that the water in the drink decreases. E) Evaporation that the water in the drink increases.
A diet Calorie equals 1 kilocalorie. I m sorry of the complying with statements correctly defines 1 kilocalorie? A) 1,000 calories, or the lot of heat compelled to raise the temperature the 1 g the water through 1,000°C B) 100 calories, or the amount of heat required to advanced the temperature that 100 g the water by 1°C C) 10,000 calories, or the quantity of heat forced to raise the temperature that 1 kg of water by 1°F D) 1,000 calories, or the quantity of heat required to progressive the temperature of 1 kg the water by 1°C E) 1,000 calories, or the quantity of heat required to advanced the temperature the 100 g the water by 100°C
The nutritional details on a cereal box reflects that one offer of a dry cereal has 200 kilocalories. If one were to burn one offer of the cereal, the amount of heat provided off would certainly be enough to progressive the temperature of 20 kg of water how countless degrees Celsius? A) 0.2°C B) 1.0°C C) 2.0°C D) 10.0°C E) 20.0°C
Liquid water"s high particular heat is greatly a repercussion of the A) tiny size the the water molecules. B) high details heat that oxygen and hydrogen atoms. C) absorption and release of warmth when hydrogen bond break and form. D) reality that water is a negative heat conductor. E) greater density of liquid water than solid water (ice).
Which type of bond must be broken for water come vaporize? A) ionic binding B) both hydrogen bonds and ionic bondsC) polar covalent bonds D) hydrogen bonds E) both polar covalent bonds and also hydrogen bonds
Temperature usually increases when water condenses. Which habits of water is most straight responsible for this phenomenon? A) the change in density when that condenses to form a fluid or heavy B) reaction with various other atmospheric link C) the relax of heat by the formation of hydrogen bond D) the relax of warm by the breaking of hydrogen bonds E) the high surface tension of water
Why go evaporation the water indigenous a surface reason cooling of the surface? A) The breaking of bonds between water molecule absorbs heat. B) The water molecules through the many heat energy evaporate much more readily. C) The solute molecules left behind absorb heat. D) Water molecule absorb warmth from the surface ar in order to gain enough energy to evaporate. E) The expansion of water vapor extracts warm from the surface.
Why does ice cream float in liquid water? A) The high surface stress and anxiety of liquid water keeps the ice cream on top. B) The ionic bonds in between the molecule in ice prevent the ice from sinking. C) Ice constantly has air balloon that keep it afloat. D) Hydrogen bond stabilize and also keep the molecules of ice cream farther apart than the water molecule of fluid water. E) The crystalline lattice the ice reasons it to it is in denser than liquid water.
Hydrophobic building material such together vegetable oil are A) nonpolar substances the repel water molecules. B) nonpolar building material that have an attraction because that water molecules. C) polar substances that repel water molecules. D) polar building material that have actually an affinity for water. E) charged molecules the hydrogen-bond v water molecules.
One mole (mol) that glucose (molecular mass = 180 daltons) is A) 180 × 10²³ molecule of glucose. B) 1 kg of glucose dissolved in 1 together of solution. C) the biggest amount of glucose that can be liquified in 1 together of solution. D) 180 kilograms the glucose. E) both 180 grams that glucose and also 6.02 × 10²³ molecules of glucose.
How plenty of molecules of glucose (C₆H₁₂O₆ molecular mass = 180 daltons) would certainly be existing in 90 grams of glucose? A) 90 × 10²³ B) (6.02/180) × 10²³ C) (6.02/90) × 10²³ D) (90 x 6.02) × 10²³ E) (90/180) × 6.02 × 10²³
How plenty of molecules that glycerol (C₃H₈O₃; molecular mass = 92) would certainly be present in 1 l of a 1 M glycerol solution?A) 1 × 10⁶ B) 14 × 6.02 × 10²³ C) 92 × 6.02 × 10²³ D) 6.02 × 10²⁶ E) 6.02 × 10²³
When one ionic link such as sodium chloride (NaCl) is put in water, the component atoms of the NaCl crystal dissociate right into individual sodium ions (Na⁺) and also chloride ions (Cl⁻). In contrast, the atoms of covalently external inspection molecules (e.g., glucose, sucrose, glycerol) execute not typically dissociate when put in aqueous solution. Which of the adhering to solutions would certainly be expected to save the greatest variety of solute particles (molecules or ions)? A) 1 together of 0.5 M NaCl B) 1 together of 0.5 M glucose C) 1 l of 1.0 M NaCl D) 1 l of 1.0 M glucose E) 1 together of 1.0 M NaCl and 1 together of 1.0 M glucose will certainly contain same numbers that solute particles.
The molar mass of glucose is 180 g/mol. Which of the complying with procedures need to you lug out to do a 1 M systems of glucose? A) Dissolve 1 g of glucose in 1 together of water. B) Dissolve 180 g the glucose in 1 together of water. C) Dissolve 180 g the glucose in 180 g of water. D) Dissolve 180 milligrams (mg) of glucose in 1 l of water. E) Dissolve 180 g of glucose in 0.8 l of water, and then add an ext water until the full volume that the systems is 1 L.
The molar fixed of glucose (C₆H₁₂O₆) is 180 g/mol. I beg your pardon of the following procedures have to you carry out to make a 0.5 M systems of glucose? A) Dissolve 0.5 g the glucose in a small volume the water, and then add much more water until the total volume of equipment is 1 L. B) Dissolve 90 g of glucose in a little volume that water, and then add an ext water until the total volume the the systems is 1 L. C) Dissolve 180 g the glucose in a tiny volume that water, and then add more water till the complete volume of the equipment is 1 L. D) Dissolve 0.5 g that glucose in 1 l of water. E) Dissolve 180 g the glucose in 0.5 together of water.
You have a freshly ready 0.1 M systems of glucose in water. Each liter of this solution consists of how countless glucose molecules? A) 6.02 × 10²³ B) 3.01 × 10²³ C) 6.02 × 10²⁴ D) 12.04 × 10²³ E) 6.02 × 10²²
The molecular load of water is 18 daltons. What is the molarity that 1 liter the pure water? (Hint: What is the fixed of 1 liter the pure water?) A) 55.6 M B) 18 M C) 37 M D) 0.66 M E) 1.0 M
You have actually a freshly prepared 1 M solution of glucose in water. You carefully pour the end a 100 mL sample of that solution. How numerous glucose molecule are included in that 100 mL sample? A) 6.02 × 10²³ B) 3.01 × 10²³ C) 6.02 × 10²⁴ D) 12.04 × 10²³ E) 6.02 × 10²²
A solid acid favor HCl A) ionizes fully in an aqueous solution. B) increases the pH when added to one aqueous solution. C) reacts with strong bases to develop a buffered solution. D) is a solid buffer at short pH. E) both ionizes fully in aqueous solutions and also is a solid buffer at low pH.
Which the the complying with ionizes completely in solution and is taken into consideration to be a solid base (alkali)? A) NaCl B) HCl C) NH₃ D) H₂CO₃ E) NaOH
A 0.01 M solution of a substance has a pH of 2. What can you conclude about this substance? A) it is a strong acid the ionizes fully in water. B) that is a strong base that ionizes totally in water. C) the is a weak acid. D) it is a weak base. E) it is no an mountain nor a base.
A given solution includes 0.0001(10⁻⁴) moles of hydrogen ions
A solution consists of 0.0000001(10⁻⁷) mole of hydroxyl ions
What is the pH that a equipment with a hydroxyl ion
Which the the adhering to solutions would require the greatest amount of basic to be included to lug the systems to neutral pH? A) gastric juice in ~ pH 2 B) vinegar in ~ pH 3 C) tomato juice at pH 4 D) black color coffee in ~ pH 5 E) household bleach in ~ pH 12
What is the hydrogen ion
If the pH that a systems is decreased from 9 to 8, it way that the A) concentration the H⁺ has diminished to one-tenth (1/10) what it to be at pH 9. B) concentration the H⁺ has increased tenfold (10X) compared to what it was at pH 9. C) concentration the OH⁻ has increased tenfold (10X) contrasted to what it was at pH 9. D) concentration of OH⁻ has decreased to one-tenth (1/10) what it to be at pH 9. E) concentration the H⁺ has increased tenfold (10X) and also the concentration that OH⁻ has diminished to one-tenth (1/10) what they to be at pH 9.
If the pH of a solution is enhanced from pH 5 to pH 7, it way that the A) concentration the H⁺ is double (2X) what it was at pH 5. B) concentration that H⁺ is one-half (1/2) what it was at pH 5. C) concentration of OH⁻ is 100 times higher than what it to be at pH 5. D) concentration of OH⁻ is one-hundredth (0.01X) what it was at pH 5. E) concentration that H⁺ is 100 times greater and the concentration that OH⁻ is one-hundredth what they were at pH 5.
One liter the a equipment of pH 2 has how many more hydrogen ion (H⁺) 보다 1 l of a solution of pH 6? A) 4 times much more B) 16 times more C) 40,000 times an ext D) 10,000 times an ext E) 100,000 times more
One liter of a systems of pH 9 has how many more hydroxyl ion (OH⁻) than 1 together of a solution of pH 4? A) 5 times much more B) 32 times more C) 50,000 times more D) 10,000 times an ext E) 100,000 time more
Which that the adhering to statements is true about buffer solutions? A) They keep a constant pH once bases are included to them yet not as soon as acids are included to them. B) They keep a continuous pH as soon as acids are included to them yet not once bases are included to them. C) They keep a relatively continuous pH of roughly 7 once either acids or bases are included to them. D) They preserve a relatively consistent pH once either acids or bases are included to them. E) they are found only in living systems and also biological fluids.
Buffers are substances that aid resist shifts in pH by A) releasing H⁺ come a solution as soon as acids room added. B) donating H⁺ come a solution once bases room added. C) releasing OH⁻ come a solution once bases room added. D) accepting H⁺ native a solution when acids space added. E) both donating H⁺ come a solution when bases are added, and accepting H⁺ once acids room added.
One of the buffers that add to pH security in human being blood is carbonic mountain (H₂CO₃). Carbonic acid is a weak mountain that dissociates right into a bicarbonate ion (HCO₃⁻) and a hydrogen ion (H⁺). Thus, H₂CO₃ ↔ HCO₃⁻ + H⁺ If the pH of the blood drops, one would expect A) a diminish in the concentration the H₂CO₃ and boost in the concentration the HCO₃⁻. B) the concentration the hydroxide ion (OH⁻) come increase. C) the concentration the bicarbonate ion (HCO₃⁻) come increase. D) the HCO₃⁻ to act together a base and also remove overfill H⁺ through the formation of H₂CO₃. E) the HCO₃⁻ to act as an acid and also remove overabundance H⁺ v the formation of H₂CO₃.
One of the buffers that contribute to pH security in human being blood is carbonic acid (H₂CO₃). Carbonic mountain is a weak mountain that, when inserted in an aqueous solution, dissociates into a bicarbonate ion (HCO₃⁻ and also a hydrogen ion (H⁺). Thus, H₂CO₃ ↔ HCO₃⁻ + H⁺ If the pH of the blood increases, one would mean A) a to decrease in the concentration that H₂CO₃ and boost in the concentration the HCO₃⁻. B) boost in the concentration of H₂CO₃ and a diminish in the concentration that HCO₃⁻. C) a to decrease in the concentration the HCO₃⁻ and an increase in the concentration that H⁺. D) boost in the concentration that HCO₃⁻ and a decrease in the concentration of OH⁻. E) a diminish in the concentration that HCO₃⁻ and boost in the concentration that both HH₂CO₃ and H⁺.
Assume that acid rain has actually lowered the pH that a specific lake to pH 4.0. What is the hydroxyl ion concentration of this lake? A) 1 × 10⁻¹⁰ mol that hydroxyl ion per liter of lake water B) 1 × 10⁻⁴ mol the hydroxyl ion per liter of lake water C) 10.0 M v regard to hydroxyl ion concentration D) 4.0 M v regard to hydroxyl ion concentration E) 1 × 10⁻⁴ mol the hydroxyl ion per liter that lake water and 4.0 M through regard come hydrogen ion concentration
Research shows that acid precipitation can damages living biology by A) buffering aquatic systems such together lakes and streams. B) to decrease the H⁺ concentration the lakes and also streams. C) enhancing the OH⁻ concentration the lakes and streams. D) washing away details mineral ions that help buffer floor solution and are essential nutrients because that plant growth. E) both diminish the H⁺ concentration of lakes and streams and increasing the OH⁻ concentration that lakes and streams.
Consider two solutions: solution X has actually a pH that 4; solution Y has a pH the 7. From this information, we deserve to reasonably conclude the A) equipment Y has no free hydrogen ion (H⁺). B) the concentration that hydrogen ion in systems X is 30 times as great as the concentration the hydrogen ions in equipment Y. C) the concentration of hydrogen ion in equipment Y is 1,000 time as good as the concentration the hydrogen ion in systems X. D) the concentration of hydrogen ion in systems X is 3 time as good as the concentration the hydrogen ions in systems Y. E) the concentration that hydrogen ion in systems X is 1,000 times as great as the concentration of hydrogen ions in solution Y.
If a solution has a pH the 7, this method that A) there are no H⁺ ions in the water. B) this is a systems of pure water. C) the concentration of H⁺ ion in the water equates to the concentration the OH⁻ ions in the water. D) this is a solution of pure water, and the concentration the H⁺ ion in the water is 10⁻⁷ M. E) this is a systems of pure water, and also the concentration the H⁺ ions equates to the concentration of OH⁻ ions in the water.
Carbon dioxide (CO₂) is readily soluble in water, according to the equation CO₂ + H₂O ↔ H₂CO₃. Carbonic mountain (H₂CO₃) is a weak acid. Respiring cells relax CO₂ right into the bloodstream. What will be the effect on pH that blood as that blood an initial comes in contact with respiring cells? A) Blood pH will decrease slightly. B) Blood pH will boost slightly. C) Blood pH will continue to be unchanged. D) Blood pH will very first increase, climate decrease as CO₂ combines through hemoglobin. E) Blood pH will an initial decrease, then increase sharply as CO₂ combines through hemoglobin.
A beaker has 100 mL of NaOH solution at pH = 13. A technician very closely pours into the beaker 10 mL that HCl in ~ pH = 1. Which of the adhering to statements correctly describes the outcomes of this mixing? A) The concentration of Na⁺ ion rises. B) The concentration of Cl⁻ ion will be 0.1 M. C) The concentration the undissociated H₂O molecules remains unchanged. D) The pH the the beaker"s contents will it is in neutral. E) The pH of the beaker"s contents falls.
Equal volumes (5 mL) the vinegar from a freshly opened up bottle are added to each of the following solutions. After complete mixing, i m sorry of the mixture will have the greatest pH? A) 100 mL that pure water B) 100 mL of freshly brewed coffee C) 100 mL of household cleanser containing 0.5 M ammonia D) 100 mL of freshly squeezed orange juice E) 100 mL the tomato juice
Increased atmospheric CO₂ concentrations might have what result on seawater? A) Seawater will become much more acidic, and also bicarbonate concentrations will certainly decrease. B) Seawater will become much more alkaline, and also carbonate concentrations will decrease. C) There will be no readjust in the pH the seawater, because carbonate will turn to bicarbonate. D) Seawater will become more acidic, and carbonate concentrations will certainly decrease. E) Seawater will certainly become more acidic, and carbonate concentrations will increase.
How would certainly acidification that seawater impact marine organisms? A) Acidification would certainly increase liquified carbonate concentrations and also promote faster expansion of corals and shell-building animals. B) Acidification would decrease dissolved carbonate concentrations and promote faster expansion of corals and also shell-building animals. C) Acidification would certainly increase dissolved carbonate concentrations and also hinder development of corals and shell-building animals. D) Acidification would decrease liquified carbonate concentrations and hinder growth of corals and also shell-building animals. E) Acidification would increase liquified bicarbonate concentrations, and cause enhanced calcification the corals and also shellfish.
One idea to minimize the impacts of burning fossil fuel on atmospheric CO₂ concentration is come pipe fluid CO₂ right into the s at depths of 2,500 feet or greater. In ~ the high pressures at such depths, CO₂ is heavier 보다 water. What potential results might result from implementing together a scheme? A) enhanced photosynthetic carbon fixation since of the increased dissolved carbon dioxide in the deep water B) increased carbonate concentrations in the deep waters C) reduced growth of corals from a readjust in the carbonate—bicarbonate equilibrium D) no effect due to the fact that carbon dioxide is no soluble in water E) both enhanced acidity that the deep waters and changes in the expansion of bottom-dwelling organisms through calcium carbonate shells
If the cytoplasm of a cabinet is at pH 7, and the mitochondrial matrix is in ~ pH 8, this way that A) the concentration of H⁺ ions is tenfold higher in the cytoplasm than in the mitochondrial matrix. B) the concentration of H⁺ ions is tenfold higher in the mitochondrial matrix 보다 in the cytoplasm. C) the concentration that H⁺ ions in the cytoplasm is 7/8 the concentration in the mitochondrial matrix. D) the mitochondrial procession is an ext acidic than the cytoplasm. E) the concentration that H⁺ ion in the cytoplasm is 8/7 the concentration in the mitochondrial matrix.
Based top top your knowledge of the polarity that water molecules, the solute molecule illustrated here is most likely A) positively charged. B) negatively charged. C) without charge. D) hydrophobic. E) nonpolar.
How numerous grams would be same to 1 mol the the compound presented in the number above? (carbon = 12, oxygen = 16, hydrogen = 1) A) 29 B) 30 C) 60 D) 150 E) 342
How plenty of grams the the link in the figure above would be required to do 1 l of a 0.5 M solution? (carbon = 12, oxygen = 16, hydrogen = 1) A) 29 B) 30 C) 60 D) 150 E) 342
How plenty of grams that the link in the figure over would be forced to do 2.5 together of a 1 M solution? (carbon = 12, oxygen = 16, hydrogen = 1) A) 29 B) 30 C) 60 D) 150 E) 342
A little birthday candle is weighed, then lighted and also placed in ~ a metal can containing 100 mL the water. Careful records are retained as the temperature the the water rises. Data indigenous this experiment are shown on the graph. What amount of heat power is released in the burning of candle wax? A) 0.5 kilocalories per gram that wax melted B) 5 kilocalories every gram of wax burnedC) 10 kilocalories every gram the wax shed D) 20 kilocalories every gram the wax melted E) 50 kilocalories every gram of wax burned
Identical warm lamps space arranged come shine on the same containers that water and also methanol (wood alcohol), so the each liquid absorbs the same amount of power minute by minute. The covalent bond of methanol molecules are nonpolar, for this reason there are no hydrogen bonds among methanol molecules. Which of the complying with graphs correctly defines what will happen to the temperature the the water and also the methanol?
Carbon dioxide (CO₂) is conveniently soluble in water, according to the equation CO₂ + H₂O ↔ H₂CO₃. Carbonic acid (H₂CO₃) is a weak acid. If CO₂ is bubbled right into a manufacturer containing pure, freshly distilled water, i m sorry of the adhering to graphs correctly defines the results?
You have two beakers. One consists of pure water, the other has pure methanol (wood alcohol). The covalent bonds of methanol molecules room nonpolar, so there space no hydrogen bonds among methanol molecules. You to water crystals that table salt (NaCl) into each beaker. Guess what will happen. A) Equal amounts of NaCl crystals will dissolve in both water and also methanol. B) NaCl crystals will NOT dissolve in one of two people water or methanol. C) NaCl crystals will dissolve readily in water however will not dissolve in methanol. D) NaCl crystals will dissolve conveniently in methanol but will no dissolve in water. E) as soon as the very first crystals that NaCl are included to water or to methanol, they will certainly not dissolve; yet as more crystals are added, the crystals will start to dissolve faster and also faster.
You have actually two beakers. One contains a equipment of HCl at pH = 1.0. The other contains a systems of NaOH at pH = 13. Right into a third beaker, you slowly and cautiously pour 20 mL that the HCl and also 20 mL the the NaOH. After finish stirring, the pH that the mixture will certainly be A) 2.0. B) 12.0. C) 7.0. D) 5.0. E) 9.0.
Many mammals manage their human body temperature by sweating. Which property of water is most straight responsible for the capacity of sweat to reduced body temperature? A) water"s readjust in thickness when that condenses B) water"s ability to dissolve molecules in the air C) the release of warmth by the development of hydrogen bonds D) the absorb of warmth by the break of hydrogen binding E) water"s high surface tension
The bonds the are broken when water vaporizes space A) ionic bonds. B) hydrogen bonds in between water molecules. C) covalent bonds in between atoms in ~ water molecules. D) polar covalent bonds. E) nonpolar covalent bonds.
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We deserve to be sure that a mole of table sugar and also a mole of vitamin C are equal in their A) fixed in daltons. B) mass in grams. C) volume. D) variety of atoms. E) variety of molecules.
Measurements display that the pH the a specific lake is 4.0. What is the hydrogen ion concentration that the lake? A) 4.0 M B) 10⁻¹⁰ M C) 10⁻⁴ M D) 10⁴ M E) 4%
Measurements display that the pH of a details lake is 4.0. What is the hydroxide ion concentration of the lake? A) 10⁻¹⁰ M B) 10⁻⁴ M C) 10⁻⁷ M D) 10⁻¹⁴ M E) 10 M
A slice of pizza has 500 kcal. If we could burn the pizza and also use all the warm to warmth a 50-L container that cold water, what would certainly be the approximate increase in the temperature the the water? (Note: A liter that cold water weighs about 1 kg.) A) 50°C B) 5°C C) 1°C D) 100°C E) 10°C
How numerous grams the acetic acid (C₂H₄O₂) would certainly you use to do 10 l of a 0.1 M aqueous solution of acetic acid? (Note: The atom masses, in daltons, are about 12 for carbon, 1 because that hydrogen, and also 16 because that oxygen.) A) 10 g B) 0.1 g C) 6.0 g D) 60 g E) 0.6 g