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nwc predictor test
st430 A&P Basic Chemistry
| Question | Answer |
|---|---|
| which of the following is true of Na+? | called the sodium ion. |
| ATP: | is an energy transfer molecule |
| Intestinal secretions are alkaline. what can decrease its pH? | the addition of H+ in the form of HCI |
| which of the following is true of iodine and radioactive iodine? | both have the same atomic numbers. |
| which of the following is an anion? | chloride ion |
| which of the following carries lopsided charge? | a polar molecule |
| which of the following can neutralize H+? | OH- |
| which group is correct? | blood pH 7.35, normal blood pH, turns litmus paper blue |
| zinc, selenium, cobalt, and iodine are all: | trace elements |
| an atom has 1 proton, 0 neutrons, and 1 electron. what will convert this atom to a cation? | lose 1 electron |
| a molecule of water has a (+) charge at one and a (-) charge at the other end of the molecule. what is the best description? | polar molecule. |
| an electrolyte: | dissociates into ions |
| which process refers to the disassociation of NaCI into Na+ and CI-? | Ionization |
| in which of the following is the number of hydrogen ions greater? | a solution with pH of 6.2 |
| a solution that has a pH of 6.8: | is acidic |
| [H+] refers to: | hydrogen ion concentration |
| an atom has 2 protons, 2 neurons, and 2 electrons; it has an atomic mass of: | 4 |
| an atom of oxygen shares its outer shell electrons with two hydrogen atoms thereby: | forming a molecule of water |
| which of the following is true of CI-? | is an anion |
| which of the following best describes a solution in which water is the solvent? | aqueous solution |
| NaCI, table salt, is called a: | electrolyte |
| the ionization of salt (NaCI): | produces a cation and an anion |
| which compound is a waste product of cellular metabolism? | carbon dioxide |
| blood has a pH range of 7.35 to 7.45 and therefore: | is alkaline |
| which of the following is most descriptive of the function of an enzyme? | catalyst |
| what kind of ion would have 8 protons in its nucleus and 9 electrons in its orbits? | anion |
| a combination of sugar granules and iron filings is best described as: | a mixture. |
| an atom of oxygen has an atomic number of 8. therefore: | all is applicable (it can share electrons with another identical atom, it can share electrons with another oxygen atom, it can form O2) |
| which of the following is descriptive of the chemical reaction in the previous question? | electrolyte->cation-> anion |
| an atom has 4 protons, 4 neurons, and 4 electrons, it: | has an atomic mass of 8 |
| the addition of H+ to blood: | makes the blood more acidic |
| water is an: | all is applicable (molecule, aqueous solvent, compound) |
| an assessment of a patient's electrolytes is performed by collecting a sample of the patient's: | blood |
| what is the energy-transferring molecule? | ATP |
| Which of the following is most descriptive of HCI? | is an acid |
| which of the following is most descriptive of a precipitate that forms during a chemical reaction? | solid |
| which of the following illustrates antacid activity? | mg(OH)2+HCI->MgCI2+ |
| which of the following is located in the orbits surrounding the nucleus? | electrons |
| which of the following is described by this statement? one atom of oxygen bonds covalently with two atoms of hydrogen. | water |
| blood is called a colloidal suspension because: | it consists of the suspended plasma proteins |
| a patient with a blood pH of 7.28: | has an excess of H+ions |
| a catalyst: | increases the speed of a chemical reaction |
| which of the following is true of an anion? | an anion carries a negative charge |
| which of the following increases the speed of a chemical reaction but is itself not used up in the chemical reaction? | a catalyst |
| which group is correct? | common molecules: O2, N2, H2o |
| which of the following is correct about the following reaction: NaCI<->Na++CI-? | ionization |
| an atom that has 3 protons, 4 neurons, and 3 electrons: | has an atomic mass of 7 |
| what do the following have in common: Pb, plumbism, and plumber? all terms refer to: | lead |
| which of the following represents bicarbonate, an anion that is important in acid-base regulation? | HCO3- |
| an atom has 1 proton, 0 neuron, and 1 electron; its isotope has: | 1 proton and 1 neuron |
| which of the following is most descriptive of the nucleus of the atom? | all is applicable (contents determine the atomic number, contents determine the atomic mass, home of the protons) |
| an atom has 3 protons, 4 neutrons, and 3 electrons; another atom has 3 protons, 3 neutrons, and 3 electrons. which of the following is most descriptive of this pair of atoms? | isotope |
| in the reaction HCI-> H++CI- : | all is applicable |
| the heart pushes blood into blood vessels as chemical energy is convereted to which form of energy? | mechanical |
| which of the following is most descriptive of ionic and covalent? | types of bonding |
| bases can be classified as being: | weak or strong |
| which compound is the universal solvent? | water |
| which of the following acts as a catalyst? | an enzyme. |
| what happens when HCI is added to a solution with a pH of 7.45? | the [H+] of the solution will increase. |
| which of the following is incorrect? | electrolytes: NaCI, KCI, CaCI2, HCO3- |
| Fe2+ is formed when iron: | loses 2 electrons. |
| iron can be a: | cation |
| which pH is considered neutral? | 7.00 |
| the sharing of electrons is referred to as: | covalent bonding |
| which of the following best describes a solution in which alcohol is the solvent? | tincture |
| a cation is a | positively charged ion. |
| which of the following is an anion? | HCO3- |
| a solution with a pH of 8: | is more alkaline than blood |
| which of the following is a measurement of hydrogen ion concentration [H+]? | pH |
| the pH of urine: | can be acidic or alkaline |
| which element must be present for a substance to be classified as organic? | carbon |
| which of the following is true of Na+? | it is a cation |
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