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Terms in this set (63)A solution with a pH of ______ has the lowest concentration of hydrogen ions. 12 Hydrogen ion concentration decreases as pH increases. As the pH moves closer to 14, the hydrogen ion concentration decreases. A solution with pH = 5 is _______ than a solution with pH = 7. 100 times more acidic The pH scale is logarithmic, which means that each step on the scale represents a 10-fold increase or decrease in hydrogen ion concentration. A solution with a pH of 7 is neutral, whereas a solution with a pH of 5 is 10 × 10 = 100 times more acidic in comparison. Based on the carbon atom pictured in the image, how many valence electrons does carbon possess? 4 The valence electrons are found in the outermost shell of an atom. The shells of an atom fill in a characteristic manner, with the first shell filling with two electrons. Since carbon has six total electrons, the remaining four electrons will be placed in the outermost shell. Based on the image shown, what can you conclude about water molecules? Water molecules are held together by polar covalent bonds. Water is a compound containing two hydrogen atoms and one oxygen atom. The oxygen-hydrogen bond is a polar covalent bond, since electrons are not equally shared between oxygen and hydrogen atoms. Biomolecules, also known as macromolecules, are large organic molecules that play important biological functions in cells. Biomolecules, or macromolecules, carry out many important functions in cells. Most organisms share a common set of monomers that are used to build biomolecules. Carbon can form many different kinds of complex molecules because one carbon atom can bond with up to four other atoms, including other carbon atoms. A carbon atom has four valence electrons in its outer shell, which allows it to bond with up to four other atoms. This allows carbon to form chains and more complex, branched molecules. H2O and CH4 are both examples of molecules. Atoms that form covalent bonds are called molecules. Water (H2O) and methane (CH4) are also called compounds because they contain two or more atoms found in a fixed ratio. Hydrogen bonds are weak chemical bonds that hold separate molecules together. Hydrogen bonds form between molecules, such as between the hydrogen and oxygen ends of neighboring water molecules, to help stabilize a given volume of these molecules. In Miller's experiment, he mixed four gases and exposed them to an electrical spark. The amino acids that formed were the ________ of the chemical reaction. products The molecules that form during a chemical reaction are the products. The reactants are the gases that underwent a chemical rearrangement. In a covalent bond, atoms Share electrons Covalent bonds occur when two or more atoms share electrons. In ionic bonds, atoms gain or lose electrons. In order to determine the atomic mass of an atom, one needs to know the number of protons and neutrons. When the number of protons and neutrons in an atom are added together, they provide the atomic mass of that atom. Nitrogen has 7 protons, 7 neutrons, and 7 electrons. What is the atomic number of nitrogen? 7 The atomic number is the number of protons that an atom possesses. This value may be found on the periodic table and is unique to each element. Sodium chloride (NaCl) dissolves well in water because it has charges that allow it to interact with water. Water is a polar molecule that interacts well with other substances with full and partial charges. In sodium chloride, the sodium ion has a full positive charge that interacts with the partial negative charges on oxygen atoms. The partially positively charged hydrogen atoms of the water molecule interact with the negative chloride ion. The bio molecules that are responsible for transmitting and storing genetic information are nucleic acids. DNA and RNA store and pass on genetic information. These are examples of nucleic acids. The elements carbon, hydrogen, and oxygen are composed of matter. The chemical building blocks called elements are made of matter. Carbon, hydrogen, and oxygen cannot be compounds because they only consist of a single element. The main difference between an acid and a base is that acids donate hydrogen ions in water whereas bases accept hydrogen ions. Acids donate hydrogen ions to lower the pH of a solution, whereas bases accept hydrogen ions to raise the pH.
An amino acid chain ultimately folds into a three-dimensional shape. Amino acids are monomers that link together to form a polymer, which is called a protein after it folds into its final three-dimensional shape. Which of the following is an ion? Na+ The positive sodium ion, Na+, is an ion. Any atom with a charge, positive or negative, is an ion. Which of the following is correct about the properties of water at different temperatures? Water molecules in ice are spaced farther apart from one another than water molecules in liquid. Stable hydrogen bonds form between water molecules at cooler temperatures. Water molecules in ice are farther apart from one another than in liquid water, making liquid water denser than ice. Which of the following is NOT a type of monomer? DNA DNA is a polymer made from nucleotide monomers. The remaining choices are monomers of carbohydrates, proteins, and nucleic acids. Which of the following represents a polymer of amino acids? Proteins Polymers are made up of repeating units of monomers. Amino acids are the monomers used to make proteins. Matter anything that has mass and occupies Element a pure substance that has distinctive physical and chemical properties, and that Atom the smallest unit of an element that Protons positively charged Nucleus made of closely Neutrons uncharged Electrons negatively
charged particles Atomic number number of protons in Isotope forms of atoms that have Atomic mass number approximately how much an atom
weighs—the combined Covalent bond formed when two atoms Molecule atoms linked by covalent bonds Organic molecule any molecule that contains Chemical compounds molecules containing Chemical reaction the process of breaking Reactants the beginning compounds that Products the compounds made as a result of a chemical reaction Polar molecules When electrons are unequally shared between covalent bond formed when two
atoms Ionic bond formed when the charges of Hydrogen bond a weak electrical attraction Solution a combination of a solute and a solvent Solute the dissolved substance (particles) Solvent the fluid into which the solute Hydrophilic - "Water-loving" Hydrophobic: - "Water-fearing" Evaporation the transition from the liquid to the gas Condensation the opposite reaction of evaporation Acids donate hydrogen ions to their Bases Accepts hydrogen ion from their surroundings. pH Scale A HIGH concentration of free hydrogen ions Biomolecules the four main types are proteins, - All are critical for living cells. Polymers long strands of repeating units of
small molecules called monomers Proteins polymers of the 20 amino acid monomers Carbohydrates the next-most-versatile biomolecules - Are simple monomer sugars and polymers of simple sugars Nucleic acids the third and most crucial category of polymers DNA DNA (Deoxyribonucleic acid) is a polymer of deoxyribonucleotide DNA provides living organisms with long-term,
stable genetic RNA (Ribonucleic acid) is a polymer of pribonucleotide RNA comes in many forms and plays many roles, but its most Lipids fourth category of biomolecules, better known as fats, oils, and steroids Triglycerides composed of three fatty acid molecules
linked to a glycerol Phospholipids composed of a phosphate group, glycerol, and two fatty acids Steroids composed of hydrocarbon rings and fatty acids Students also viewedBiology BSC 1005 SSC Ch. 4-5141 terms Danny_Fonseca9 Bio128 terms mrfleenor Chapter 3: Chemistry of Life: Ingredients for Life20 terms wantakey Ch 6 Bio Quiz22 terms Ethan_Arispe5 Sets found in the same folderChapter 5 (Bio 5)48 terms garcia_andrea123 Chapter 1 (Bio 5)40 terms garcia_andrea123 Chapter 8: Chromosomes and Human Genetic…66 terms garcia_andrea123 Ch 6 Bio Quiz22 terms Ethan_Arispe5 Other sets by this creatorGRE Words - Letter E36 terms garcia_andrea123 GRE Words - Letter D36 terms garcia_andrea123 GRE Words - Letter C33 terms garcia_andrea123 GRE Words - Letter B13 terms garcia_andrea123 Verified questions
health The diameter of a proton is estimated to be around $10^{-15}$ of a meter. Express this in decimal notation. Verified answer
anatomy Linear, analytical, and verbal thinking occurs in the hemisphere of the ________ cerebrum, which is on the left in most people. Verified answer
chemistry Potassium hydrogen phthalate, known as KHP (molar mass = 204.22 g/mol), can be obtained in high purity and is used to determine the concentration of solutions of strong bases by the reaction $$ \mathrm { HP } ^ { - } ( a q ) + \mathrm { OH } ( a q ) \longrightarrow \mathrm { H } _ { 2 } \mathrm { O } ( l ) + \mathrm { P } ^ { 2 - } ( a q ) $$ If a typical titration experiment begins with approximately 0.5 g of KHP and has a final volume of about 100 mL, what is an appropriate indicator to use? The $\mathrm { p } K _ { \mathrm { a } } \text { for } \mathrm { HP } ^ { - } \text { is } 5.51.$ Verified answer
chemistry Contrast the theory of how our moon formed with how the satellites of gas giants may have formed. Verified answer Recommended textbook solutionsChemical Reaction Engineering3rd EditionOctave Levenspiel 228 solutions Quantitative Chemical Analysis8th EditionDaniel C. Harris 921 solutions Organic Chemistry6th EditionJanice Gorzynski Smith 2,029 solutions Organic Chemistry3rd EditionDavid Klein 3,087 solutions Other Quizlet setsQuiz 215 terms Javian_0717 Bio 101 chapter 315 terms jacobsnyder03 physio ch 251 terms jennifer_Perez7 Ch 2.3,24 Bio28 terms natnat0601 What are solutions with a pH of 7?The pH scale is centered on 7 - meaning that a solution with a pH of 7 is perfectly neutral (neither acidic nor basic).
What does pH of 7 indicate about a substance quizlet?A pH of 7 is neutral. A pH less than 7 is acidic. In general, a water with a pH < 7 is considered acidic and with a pH > 7 is considered basic.
Which aqueous solution is with pH 7?pH=7: neutral solution.
What does a pH below 7 indicate quizlet?On the pH scale, numbers less than 7 indicate a(n): acidic solution. On the pH scale, numbers less than 7 indicate an acidic solution.
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A solution with a pH of 7 is Quizlet
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