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CHEM 130-90 LCCC

Chemistry Midterm Study

A 2.0 L bottle of soda has how many gallons of soda? 0.53 gal (2 Sig fig)
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
Does NOT apply to ionic bonding or ionic compounds. Metals form the (-) ions while nonmetals form the (+) ions.
A football player weighs in at 275 lbs. How many grams? 125000g 275lbs*1kg/2.2lbs*1000g/kg=
1 gal 3.78 L
What is the charge on an ion formed by an element in group 16? -2
Cs Cesium
Sc Scandium
S Sulfur
Hg Mercury
As Arsenic Semi-metal (metalloid)
If the meniscus is between 22 and 23mL what is the measurement? 22.6mL (watch sig sigs)
A graduated cylinder has marking at increments______smallest and _______largest. 1mL 10mL
Form of chemical change digestion
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
Potassium k 19
Sulfur S
Manganese Mn
Mg Magnesium
What compound is formed between iron(III) ion and the ion formed by Cl FeCl3
38.5 inches 0.978 meters
Chromium (II) phosphate? Cr3(PO4)2
Isotopes of a given element different mass numbers, but same number of protons
How many electrons are in the outer shell of nitrogen? 5
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
CO3-2 (Polyatomic ion) Carbonate
NO3-1 (Polyatomic ion) Nitrate
SO4-2 (Polyatomic ion) Sulfate
Normal body temp 98.6 degree F
Does a child have a fever if temp is 306K? No Less than 37 degree C = 91degree F 306K-273=33degreeC
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
If a kicker can kick 45meters he should be able to kick 45yards? T/F True 1 meter = 1.09361 yard
Sodium Sulfide Na2S
Nickel (III) hydroxide Ni(OH)3
Copper (II) Oxide CuO
Calcium acetate Ca(C2H3O2)2
Be 4 Beryllium 9
Be has _____electrons Ne has _____ electrons Cl has _____ electrons 2 8 7
Round to 3 sig fig: 48.652, 10477, 8.00305 48.7, 10500, 8.00
How many atoms in Ca(HCO3)2? 11 atoms
How many atoms in Mn(OH)4 9 atoms
COCl2 2 single bonds, 1 double bond, planar triangular
Which reactant element is oxidized in the following reaction? Mg(s) + 2CuCl2(aq) ---MgCl2(aq) + 2Cu(s) Mg
NaNO3 Sodium nitrate
FeF3 Iron (III) Fluoride
Which process is active when rain forms in the atmosphere? Condensation
CO2 6+8+8=22 Protons
N2O5 dinitrogen pentoxide
PCl3 phosphorous trichloride
How many sig figs? 0.012 72,700 9.909*10^5 2 3 4
NOT capable of forming hydrogen bonds? CH4
______will always cause the pressure exerted by a gas to increase increase in temperature
Ca3N2 Calcium and nitrogen ionic compound
chlorine =forms a (-) ion, and is in period 3, group 17 Cl
will NOT speed up a chemical reaction? catalyst
Gold & Silver are in the same_______? group
Argon & Aluminum are in the same______? period
Two 50mg tabs would supply a toxic dose for a patient of 175lb (toxic dose 2mg per kg of body weight)? T/F False
Nitrogen has _______ valance electrons in its outer shell 5
Fluorine has ______ valance electrons 7
Atom A and B Isotopes have the same _______ number but different _______ numbers. Are known as isotopes. atomic number, mass number
Molecular compounds PCl3 Cl2
Because of _________, C8H18 would have the highest boiling point of the following C2H6, C4H10, C6H14, C8H18 London forces
A kicker capable of a kick 55yds should be capable of a kick 55m? T/F False 55yds =50m
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
One molecule of Fe2(CO3)3 has a mass of ______g? 291.6g
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
________compounds result from atoms gaining and losing electrons, while ________compounds result from atoms sharing electrons Ionic molecular
As air _________ falls so does air __________ temperature pressure
Since the electronegativity of C is 2.5, and O is 3.5 (True!) chemical bond formed is _________ polar
a double bond results from ___ bonding atoms sharing ___ electrons 2 4
C(s) = O2(g) ---> CO2(g) heat Combination exothermic
dead chemist Barium
ionic compound NaCl structure each ion is surrounded by 6 ions of opposite charge in an extended array of ions
CO3^2- carbonate
NO3+ A nitrate dioxaziridin-3-ium 3-oxide
MnCl3 Manganese (III)
Cu2SO4 Copper (I)
An element in group 2 can NOT form an ionic bond with ______ Ca
NaNO3 Sodium nitrate
Li, Na, K all have the same charge when they form ions
Elements in group ____ form +1 ions, group ____ form +2, group ___ form -1 ions 1, 2, 17
Na2SO4 sodium sulfate
Cr3(PO4)2 chromium (II) phosphate
CaCl2 calcium chloride
CoO Cobalt (II) oxide
Ions will lose or gain electrons in order to obtain 8 in their outer shells Octet rule
Cu3N2 Copper(II)Nitride
Ca(OH)2 Calcium hydroxide
If an atom gains one or more electrons it becomes a positive ion. T/F False
K2SO4 potassium sulfate
Cr(NO3)3 chromium nitrate
CrN chromium nitride
Na and F form ____ bonds ionic
Lewis dot for Ca____, N____, Cl____ 2,5,7 electrons
compound formed magnesium ions and carbonate ions MgCO3 (charge on Mg ion is +2 and charge on carbonate ion is -2)
valence electrons group 2 ____ and group 16____ 2, 6
Mg and P combine to form ionic compound Mg3P2
FeO iron (II)oxide
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
group 15 ionic charge 3+ or 5+
Fe2S3 iron (III) sulfide
K2SO4 potassium sulfate
ionic compound of K and N K3N potassium nitride
Na2S charge +1
________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
group 17 ______ one electron to form charge of -1. gain
NH4NO3 contains both negative and positive polyatomic ions. T/F True
V(NO3)3 Vanadium (III) nitrate
CaBr2 Calcium bromide
the charge on the Fe ion in FeCl3 is ____ +3
MgSo4 magnisium sulfate
CuS2 Copper (I) Sulfide
AlCl3 aluminum chloride
Ni2O3 Nickel (III) oxide
CaCO3 Calcium carbonate
Ti(NO3)2 Titanium (II)
Cu3N Copper (I)
HCO3-1 bicarbonate
AlCl3 aluminum chloride
Ni2O3 Nickel (III) oxide
CaCo3 calcium carbonate
NH4NO3 has _____ and _____ polyatomic ions positive, negative
Ti(NO3)2 Titanium (II)
Cu3N Copper (I)
CaCl2, the subscript 2 indicates there are twice as many chloride ions as calcium ions
group 1 lose 1 electron to form (+1) charged ions
group 15 gain 3 electrons to form (-3) charged ions
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
Ca3(PO4)2 calcium phosphate
CoP Cobalt (III) phosphide
Fe2S3 iron (III) sulfide
K2SO4 potassium sulfate
MgCO3 magnesium carbonate magnesium+2 carbonate-2
NO3-1 nitrate
NO2-1 nitrite
group 3 valence electron 3
group 4 valence electron 2 to 4
group 5 valence electron 2 to 5
group 6 valence electron 2 to 6
group 7 valence electron 2 to 7
group 8 valence electron 2 or 3
group 9 valence electron 2 or 3
group 10 valence electron 2 or 3
group 11 valence electron 1 or 2
group 12 valence electron 2
groups 3-12 transition metals
1 in 2.54 cm
1 mile 1.6 km
1 gal 3.78 L
1 kg 2.2 lb
What is the formula of the ionic compound formed between an iron (III) ion and the ion formed by Cl? FeCl3
38.5 in = ? meters 0.978 m
How many electrons? Be, Cl, Ne Be 2, Cl 7, Ne 8
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
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
Metals form the (-) ions while nonmetals form the (+) ions. True or False True
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
True or False In a standard periodic table, elements with similiar chemical properties are usually found in the same group. True
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
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)
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)
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)
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
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
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
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
Created by: graftngrl



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