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25 Cards in this Set
- Front
- Back
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Which of the following represents a chemical change in a substance? A) Burning B) Freezing C) Boiling D) Dissolving E) Melting |
A |
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Which of the following are intensive properties of a substance? A) All B) hardness, density, and boiling point C) density and boiling point D) Hardness and Density E) Boiling Point and Temperature |
A |
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If the density of water is 1.0g/cm^3, how many kilograms are in an Olympic size swimming pool that contains 2.5(10^3)m^3 of water? A) 2.5(10^2) kg B) 2.5 kg C) 1.0(10^-3) kg D) 2.5(10^6) kg E) 2.5(10^3) kg
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D |
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Put the following in order from the highest to lowest temp. 21 C, 73 F, 295 K |
73F, 295 K, 21C |
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Sample A has 5g of Br2. Sample B has 5g of Cl2. Sample C has 5g of I2. Sample D has 5g of F2. Which sample has the most atoms? |
Sample D |
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Which of the following elements typically form(s) a +2 cation? Ca, I, Mg, Rb A) Rb B) Ca C) Mg D) Mg and Ca E) I |
Mg and Ca |
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An isotope of calcium has an atomic mass of 40 and atomic number of 20. How many protons, neutrons and electrons does it have? |
20 protons 20 neutrons 20 electrons |
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An imaginary element has two stable isotopes. 1) 35.968 amu at 24.24% 2) 37.966 amu at 75.76%. Calculate the average mass in amu. A) 36.967 B) 36.97 C) 37.482 D) 100.0 E) 37.48 |
E |
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If the average person weighs 1.30(10^2) lbs, what would be the weight of exactly 1 mol of people? A) 130 lb B) 2.16(10^-22) lb C) 6.02(10^23) lb D) 7.83(10^25) lb E) 7.69(10^-3) lb |
D |
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Order the following elements based on their ability to conduct heat and electricity from highest to lowest.
As Cu F |
Cu>As>F |
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Which of the following is a molecule and a compound? A) Co B) CO C) Cl2 D) KBr E) Ar |
B |
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What is the molar mass of PCl5 A) 677.48 g/mole B) 208.22 g/mole C) 208.22 amu/mole D) 332.10 g/mole E) 66.42 g/mole |
B |
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How many O atoms are there in two molecules of C6H2(NO2)3CH3?
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12 |
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An oxide of chlorine is 38.76% mass by chlorine and 61.24% by mass oxygen. What is the empirical formula? A) Cl2O5 B) ClO3 C) Cl2O7 D) ClO4 E) ClO |
C |
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A molecule has an empirical formula CF and a molar mass between 180 and 190 g/mole. what is the molecular formula? A) Cf B) C6F6 C) CF6 D) C6F E) C5F5 |
B |
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How many moles of O2 (g) are required to produce 5.0(10^1) moles of CO2 (g) by the combustion of methane CH4?
2CH4(g) + 4O2 = 2CO2 + 4H2O |
1.0(10^2) mole O2 (g) |
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What is the concentration of a solution made by diluting 30.0 mL of 15.0M HNO3 to a total volume of 2.00L? |
D. 0.225M |
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Select the soluble salts from the following: K3PO4, CaCO3, CuS, Hg2(NO3)2
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K3PO4 and Hg2(NO3)2 |
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2Al (s) + Fe2O3 (s) = 2Fe (l) + Al2O3 (s)
Is this a redox reactions? What is oxidized and what is reduced? |
Yes, Al is oxidized and Fe is reduced |
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Give the formulas corresponding to the following names.
Magnesium Iodide, Cobalt (III) sulfate |
MgI, CoSO4 |
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A sample of an ideal gas at 25 C occupies 3.0 L at 2.00 atm. What volume will it occupy at 10 C and the same pressure? |
2.85 L |
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Consider a container filled with a gas. Which of the following will increase the pressure in the container? 1) Add gas without changing temp or volume 2) Raise temp without changing volume 3) Increase the volume without changing temp |
1 and 2 |
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What is the molar mass of a gas if a sample has a density of 5.86 g/L at 1.0 atm and 0 C? |
131 g/mol |
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What volume of a gas at 298 K and 0.5 atm is produced by the decomposition of a 0.10 mL of NaN3 by the reaction
2NaN3 (s) = 2Na ( s) + 2N2 (g)
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7.34 L |
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Put the following in lowest to highest RMS average velocity
1) H2 at 298 K 2) Ar at 273 K 3) Ar at 298 K
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2<3<1 |
