Chemistry Midterm Study
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| A 2.0 L bottle of soda has how many gallons of soda? | 0.53 gal (2 Sig fig)
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| An isotope of potassium (k19) has 19 protons 19 electrons and 21 neutrons. Its mass number and atomic number are, respectively.... | Atomic mass 40, Atomic number 19
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| Does NOT apply to ionic bonding or ionic compounds. | Metals form the (-) ions while nonmetals form the (+) ions.
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| A football player weighs in at 275 lbs. How many grams? | 125000g
275lbs*1kg/2.2lbs*1000g/kg=
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| 1 gal | 3.78 L
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| What is the charge on an ion formed by an element in group 16? | -2
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| Cs | Cesium
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| Sc | Scandium
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| S | Sulfur
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| Hg | Mercury
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| As | Arsenic
Semi-metal (metalloid)
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| If the meniscus is between 22 and 23mL what is the measurement? | 22.6mL (watch sig sigs)
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| A graduated cylinder has marking at increments______smallest and _______largest. | 1mL 10mL
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| Form of chemical change | digestion
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| A 110lb woman is suppose to receive 3mg of medicine per kg of body mass, at 30mg per pill how many pills should she take? | 5 pills
110lb*1kg/2.2lb=50kg
50kg*3mg/1kg=150mg
150mg*1pill/30mg =5pills
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| Potassium | k 19
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| Sulfur | S
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| Manganese | Mn
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| Mg | Magnesium
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| What compound is formed between iron(III) ion and the ion formed by Cl | FeCl3
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| 38.5 inches | 0.978 meters
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| Chromium (II) phosphate? | Cr3(PO4)2
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| Isotopes of a given element | different mass numbers, but same number of protons
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| How many electrons are in the outer shell of nitrogen? | 5
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| In order to measure temp to 1/10th a degree (i.e. 17.5 degree C) the thermometer must have divisions at________ | 1 degree Celsius
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| CO3-2 (Polyatomic ion) | Carbonate
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| NO3-1 (Polyatomic ion) | Nitrate
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| SO4-2 (Polyatomic ion) | Sulfate
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| Normal body temp | 98.6 degree F
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| Does a child have a fever if temp is 306K? | No Less than 37 degree C = 91degree F
306K-273=33degreeC
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| Toxic dose is > 1.0 kg of body mass. The medication is supplied 150mL liquid. A 12kg child ingests 125mL is it toxic? | Yes it is toxic
125mL*150mg/mL = 18.75g = toxic >12g
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| If a kicker can kick 45meters he should be able to kick 45yards? T/F | True
1 meter = 1.09361 yard
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| Sodium Sulfide | Na2S
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| Nickel (III) hydroxide | Ni(OH)3
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| Copper (II) Oxide | CuO
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| Calcium acetate | Ca(C2H3O2)2
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| Be | 4 Beryllium 9
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| Be has _____electrons Ne has _____ electrons Cl has _____ electrons | 2
8
7
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| Round to 3 sig fig: 48.652, 10477, 8.00305 | 48.7,
10500,
8.00
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| How many atoms in Ca(HCO3)2? | 11 atoms
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| How many atoms in Mn(OH)4 | 9 atoms
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| COCl2 | 2 single bonds, 1 double bond, planar triangular
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| Which reactant element is oxidized in the following reaction? Mg(s) + 2CuCl2(aq) ---MgCl2(aq) + 2Cu(s) | Mg
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| NaNO3 | Sodium nitrate
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| FeF3 | Iron (III) Fluoride
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| Which process is active when rain forms in the atmosphere? | Condensation
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| CO2 | 6+8+8=22 Protons
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| N2O5 | dinitrogen pentoxide
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| PCl3 | phosphorous trichloride
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| How many sig figs? 0.012 72,700 9.909*10^5 | 2
3
4
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| NOT capable of forming hydrogen bonds? | CH4
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| ______will always cause the pressure exerted by a gas to increase | increase in temperature
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| Ca3N2 | Calcium and nitrogen ionic compound
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| chlorine =forms a (-) ion, and is in period 3, group 17 | Cl
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| will NOT speed up a chemical reaction? | catalyst
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| Gold & Silver are in the same_______? | group
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| Argon & Aluminum are in the same______? | period
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| Two 50mg tabs would supply a toxic dose for a patient of 175lb (toxic dose 2mg per kg of body weight)? T/F | False
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| Nitrogen has _______ valance electrons in its outer shell | 5
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| Fluorine has ______ valance electrons | 7
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| Atom A and B Isotopes have the same _______ number but different _______ numbers. Are known as isotopes. | atomic number,
mass number
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| Molecular compounds | PCl3
Cl2
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| Because of _________, C8H18 would have the highest boiling point of the following C2H6, C4H10, C6H14, C8H18 | London forces
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| A kicker capable of a kick 55yds should be capable of a kick 55m? T/F | False
55yds =50m
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| It is difficult to breathe in high mountains because the atmospheric pressure is lower therefore there are fewer oxygen molecules to breath. T/F | True
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| One molecule of Fe2(CO3)3 has a mass of ______g? | 291.6g
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| For the following reaction, both adding MgCl2 and lowering the temp will cause a shift to the left. Mg(s) + 2HCl(aq) <------>MgCl2(aq) + heat T/F | False
NOT lowering temp
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| ________compounds result from atoms gaining and losing electrons, while ________compounds result from atoms sharing electrons | Ionic
molecular
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| As air _________ falls so does air __________ | temperature
pressure
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| Since the electronegativity of C is 2.5, and O is 3.5 (True!) chemical bond formed is _________ | polar
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| a double bond results from ___ bonding atoms sharing ___ electrons | 2
4
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| C(s) = O2(g) ---> CO2(g) heat | Combination
exothermic
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| dead chemist | Barium
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| ionic compound NaCl structure | each ion is surrounded by 6 ions of opposite charge in an extended array of ions
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| CO3^2- | carbonate
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| NO3+ | A nitrate
dioxaziridin-3-ium 3-oxide
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| MnCl3 | Manganese (III)
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| Cu2SO4 | Copper (I)
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| An element in group 2 can NOT form an ionic bond with ______ | Ca
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| NaNO3 | Sodium nitrate
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| Li, Na, K | all have the same charge when they form ions
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| Elements in group ____ form +1 ions, group ____ form +2, group ___ form -1 ions | 1, 2, 17
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| Na2SO4 | sodium sulfate
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| Cr3(PO4)2 | chromium (II) phosphate
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| CaCl2 | calcium chloride
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| CoO | Cobalt (II) oxide
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| Ions will lose or gain electrons in order to obtain 8 in their outer shells | Octet rule
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| Cu3N2 | Copper(II)Nitride
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| Ca(OH)2 | Calcium hydroxide
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| If an atom gains one or more electrons it becomes a positive ion. T/F | False
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| K2SO4 | potassium sulfate
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| Cr(NO3)3 | chromium nitrate
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| CrN | chromium nitride
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| Na and F form ____ bonds | ionic
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| Lewis dot for Ca____, N____, Cl____ | 2,5,7 electrons
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| compound formed magnesium ions and carbonate ions | MgCO3
(charge on Mg ion is +2 and charge on carbonate ion is -2)
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| valence electrons group 2 ____ and group 16____ | 2, 6
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| Mg and P combine to form ionic compound | Mg3P2
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| FeO | iron (II)oxide
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| Iron (II) is Fe+2 and O forms -2 ions, so FeO Iron (II)- Fe has +2 ion and O has -2 ion forming an ionic bond due to ___ ___ ___ ____. | attraction between opposite charges
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| group 15 ionic charge | 3+ or 5+
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| Fe2S3 | iron (III) sulfide
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| K2SO4 | potassium sulfate
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| ionic compound of K and N | K3N potassium nitride
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| Na2S charge | +1
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| ________are used in the chemical formulas of an ionic compound to show how many ions of each type are required for the compound to be neutrally charged. | Subscripts
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| group 17 ______ one electron to form charge of -1. | gain
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| NH4NO3 contains both negative and positive polyatomic ions. T/F | True
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| V(NO3)3 | Vanadium (III) nitrate
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| CaBr2 | Calcium bromide
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| the charge on the Fe ion in FeCl3 is ____ | +3
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| MgSo4 | magnisium sulfate
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| CuS2 | Copper (I) Sulfide
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| AlCl3 | aluminum chloride
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| Ni2O3 | Nickel (III) oxide
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| CaCO3 | Calcium carbonate
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| Ti(NO3)2 | Titanium (II)
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| Cu3N | Copper (I)
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| HCO3-1 | bicarbonate
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| AlCl3 | aluminum chloride
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| Ni2O3 | Nickel (III) oxide
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| CaCo3 | calcium carbonate
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| NH4NO3 has _____ and _____ polyatomic ions | positive, negative
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| Ti(NO3)2 | Titanium (II)
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| Cu3N | Copper (I)
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| CaCl2, the subscript 2 indicates | there are twice as many chloride ions as calcium ions
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| group 1 | lose 1 electron to form (+1) charged ions
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| group 15 | gain 3 electrons to form (-3) charged ions
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| ionic bonds result from | electrons transfer reactions, one atom loses 1 or more electron to become positive and another atom gains 1 more electron to become negative
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| Ca3(PO4)2 | calcium phosphate
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| CoP | Cobalt (III) phosphide
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| Fe2S3 | iron (III) sulfide
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| K2SO4 | potassium sulfate
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| MgCO3 | magnesium carbonate
magnesium+2 carbonate-2
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| NO3-1 | nitrate
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| NO2-1 | nitrite
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| group 3 valence electron | 3
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| group 4 valence electron | 2 to 4
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| group 5 valence electron | 2 to 5
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| group 6 valence electron | 2 to 6
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| group 7 valence electron | 2 to 7
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| group 8 valence electron | 2 or 3
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| group 9 valence electron | 2 or 3
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| group 10 valence electron | 2 or 3
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| group 11 valence electron | 1 or 2
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| group 12 valence electron | 2
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| groups 3-12 | transition metals
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| 1 in | 2.54 cm
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| 1 mile | 1.6 km
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| 1 gal | 3.78 L
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| 1 kg | 2.2 lb
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| What is the formula of the ionic compound formed between an iron (III) ion and the ion formed by Cl? | FeCl3
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| 38.5 in = ? meters | 0.978 m
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| How many electrons? Be, Cl, Ne | Be 2, Cl 7, Ne 8
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| True of False Because K is in the same period, but left of Br on the p-table, an atom of K is smaller than an atom of Br | False
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| True of False AB2 describes the chemical formula of an ionic compound that forms between the elements in group 2 and group 16. | False /AB
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| Metals form the (-) ions while nonmetals form the (+) ions. True or False | True
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| True or False According to the rules that govern the naming of ionic compounds, the positive ions are always named first followed by the negative ions. | True
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| True or False In a standard periodic table, elements with similiar chemical properties are usually found in the same group. | True
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| Write chemical formulas and the name the compounds for all ionic compounds that would form between the following ions. i.e. Na+ and Cl is NaCl, sodium chloride. K+, Co+3, S-2, NO3-1 | K2S, KNO3, CO2S3, CO(NO3)3
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| A solution is made by dissolving 75 g of sugar in 450 g of water. What is the % (m/m) of this solution? | [75 g / (75 g + 450 g )] x 100 = 14% (m/m)
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| 26.5 g of NaCl is dissolved in enough water to make 375 mL of solution. What is the % (m/v) of this solution? | (26.5 g / 375 mL) x 100 = 7.07% (m/v)
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| When 37.5 mL of ethanol is mixed with 125 mL of water, the resulting solution has a volume of 159.7 mL. What is the % (v/v) of the ethanol this solution? | (37.5 mL / 159.7 mL) x 100 = 23.5% (v/v)
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| How many g of CaCl2 are in 2.75 L of a 4.80% (m/v) CaCl2 solution? | 4.80% = 0.0480 as a decimal, 0.0480 x 2750 mL = 132 g
(4.80 g / 100 mL) = (? g / 2750 mL) ? = 132 g
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| If a particular brand of red wine is 12.5% (v/v) in ethanol, how many mL of ethanol are in a 0.75 L bottle of that red wine? | 12.5% = .0125 as a decimal, 0.125 x 750 mL = 94 mL
(12.5 mL / 100 mL) = (? mL / 750 mL) ? = 94 mL
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| What is the mass, in g and mg, of the dissolved O2 in 1.0 kg of water if the level of the dissolved O2 is 0.00080% (m/m)? | (0.00080 g / 100 g) = (? g / 1000 g) ? = 0.0080 g = 8.0 mg
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| One serving (one 12 ounce can = 355 mL) of a soft drink contains 39 g of sugar. How much sugar does a person consume if they drink an entire 2.0 L bottle of the soda? | (39 g / 355 mL) x 100 = 11% (m/v)
11 % = 0.11 as a decimal, 0.11 x 2000 mL = 220 g
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