Answers created by Owen Bell
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Why is this statement false: "If 10 grams of propane burn, you need 50 grams of oxygen."?
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Question #f2baa
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Question #d24f9
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The IE of H is 1.31 MJ/mole. If all three electrons in Li were in the 1st shell at a distance equal to that of H, which of the following values would be the better estimate of the first ionization energy of Lithium: 3.6 MJ/mole or 0.6 MJ/mole? Why?
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Question #82e8d
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If someone says you're wont to buy flowers, what does he or she mean?
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Where are atoms that tend to gain electrons located in the periodic table of the elements?
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What is an isothermal process with an example?
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Question #a8780
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Is NF3 an acid or a base?
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What conditions are present to determine whether a reaction will be sn1 or sn2?
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How many pi bonds are in #SO_2#?
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What English helping verb is always used to translate the pluperfect tense?
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What is the mass percent of carbon in propanoic acid #(C_2H_5COOH)#?
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According to the VSEPR theory, a molecule with the molecular formula of #A_2# has what shape?
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Question #73f32
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Why is Hess' law useful to calculate enthalpies?
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What is the balanced net ionic equation for #H_3PO_4(aq) + Ca(OH)_2(aq) -> Ca_3(PO_4)_2(aq) + H_2O(l)#?
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Question #578d1
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Question #45625
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Question #9b9c9
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What is the molecular formula of a compound with a mass of 180 grams and an empirical formula of #CH_2O#?
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What is the formula for sodium nitride?
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In the formula #H_2O_2 -> H_2O + O_2#, how many grams of #O_2# are produced from the decomposition of 68 g of #H_2O_2#?
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How would you know if an element is an isotope?
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What is the molar mass of #K#?
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What is the most common isotope of chlorine?
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How do you find the slope and intercept of #y=2/3x+4#?
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What is the electron configuration for a chloride ion?
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Question #ea867
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If the diameter of a circle is 20cm, what is the area?
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What are the intermolecular forces of CHF3, OF2, HF, and CF4?
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A compound contains 40% calcium, 12% carbon, and 48% oxygen by mass. What is the empirical formula of this compound?
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What is the difference between standard enthalpy of combustion and standard enthalpy of formation?
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How are alkyl groups electron donating?
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How many individual atoms make up one unit of aluminum chloride, #AlCl_3#?
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You need to construct a regular polygon. When you draw two sides, the interior angle created between them is 120°. What will be the sum, in degrees, of the measures of the interior angles of this polygon when it is completed?
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What is the distance between # (–2, 1, 3) # and #(8, 6, 0)
#?
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What is the molecular weight of the acetic acid #(CH_3CO_2H)#, rounded to the nearest integer?
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Is electric charge a physical property of matter?
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Is there a way to "disable" graphs from auto-updating when writing an answer?
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Samantha ran 5 miles in 42 minutes. Meghan ran 8 miles in 68 minutes. Who has a faster speed in minutes per mile?
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What is the volume of #H_2# generated by reacting 4.33g of #Zn# with excess #H_2SO_4# at 38°C and 760 torr?
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An ideal gas has a volume of 2.28 L at 279 K and 1.07 atm. What is the pressure when the volume is 1.03 L and the temperature is 307 K?
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How do you solve for y in #9-y=1.5x#?
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How do valence electrons relate to the periodic table?
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What element has an electron notation #(Kr)5s^(2)4d^(10)5p^2#?
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Do any of the following compounds exhibit london dispersion forces: CO, NH3, CO2, CH4, and H2?
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Question #76404
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How do ionization energy and electron affinity determine whether atoms of elements will combine to form ionic compounds?
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Gallium has two naturally occurring isotopes. The mass of gallium-69 is 68.9256 amu and it is 60.108% abundant. The mass of gallium-71 is 70.9247 amu and it is 39.892% abundant. What is the atomic mass of gallium?
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What is the distance between #(8, 2) # and # (4, -5)
#?
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Mr. Jacobs is 4 times as old as his son. Five years ago, he was was 9 times as old as his son. What is Mr. Jacob's age?
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What allows gravity to pull in on things without using energy?
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Does hydrogen bonding have a directional character?
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Jennifer works in a music store and earns 8.2% commission on each sale. If Jennifer sells a tuba and earns $125.25, what is the price of the tuba?
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How would you explain the difference between van der Waals interactions and hydrophobic interactions?
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How does temperature affect the dissociation constant?
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What does resonance mean in chemistry?
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What is the conductivity of salts?
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What is the difference between a chemical symbol and a chemical formula?
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Which of the following is Lewis base: AlCl3, CO, CO2, or BF3?
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Lead (II) nitrate reacts with potassium iodide to form lead (II) iodide and potassium nitrate. How do you write the balanced equation for this?
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Can I make a hexagon with 3 right angles?
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What happens to atoms during chemical reactions?
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The half-life of the decay of radioactive cesium(134) has been reported to be 2.062 years. What fraction of the original radioactivity will remain after 67 months?
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Question #d6b39
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Why is the kelvin scale used for gas laws?
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Why are neutrons heavier than protons?
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How do you write "calcium + nitrogen -> calcium nitride"?
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What is the variance of the following numbers?:
63, 54, 62, 59, 52,
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What is a quadrilateral that is not a parallelogram and not a trapezoid?
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Are there atoms that can form covalent and ionic bonds?
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A 30-60-90 triangle has a hypotenuse of length 9.8. What is the length of the longer of the two legs?
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What is the formula of potassium phosphate in grams/mole?
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Question #11baf
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In the compound #PCl_3#, how many total valence electrons are present?
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What is the dissolution reaction for #KNO_3#. How many moles of ions are formed from it?
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How many atoms are in 2.0 mol of Cu?
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What causes London dispersion forces?