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nwc predictor test

st430 A&P Basic Chemistry

QuestionAnswer
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
Created by: editsuchan
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