Answers created by Chuck W.
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Question #35197
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The half-life of an element is #5.8 x 10^11#. How long does it take a sample of the element to decay to #2/5# its original mass?
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Red light of frequency #4.37 x 10^14# Hz is required to excite a certain electron. What energy did the electron gain from the light?
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What is the number of molecules of 140 g of CO?
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Question #c1b5b
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Question #dd2c7
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Question #d7c8a
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Question #2add8
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Why can two #s# orbitals NOT be degenerate?
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What is the formula for calculating the pressure of a gas?
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Container A holds 757 mL of ideal gas at 2.60 atm. Container B holds 164 mL of ideal gas at 4.80 atm. If the gases are allowed to mix together, what is the resulting pressure?
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Question #197e4
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Suppose #"2.83 g"# of ammonium chloride solid is placed into a closed, evacuated rigid container, and allowed to decompose at a certain temperature. If 40% of it decomposed into ammonia and hydrogen chloride gas, what is #K_c# for this reaction?
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How do you determine the electron configuration of Cl?
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How much work does it take to raise a #5 kg # weight #14 m #?
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Question #0bc73
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A container has a volume of #18 L# and holds #9 mol# of gas. If the container is compressed such that its new volume is #8 L#, how many moles of gas must be released from the container to maintain a constant temperature and pressure?
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How do water molecules dissolve a salt?
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How can metals be distinguished from non metals on the periodic table?
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The density of aluminum is #2.70# #g##/cm^3#. What is the mass of a solid piece of aluminum with a volume of #1.50# #cm^3#?
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Question #890cf
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Question #92e99
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Question #6f0e8
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What is the oxidation state of each element in #COH_2#?
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Question #dc3c2
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Question #f7a41
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A 3.0 mL sample of #HNO_3# solution is exactly neutralized by 6.0 mL of .50 M #KOH#. What is the molarity of the #HNO_3# solution?
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What are the impacts of acid rain?
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Question #6181b
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Question #fb741
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Question #6aab1
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What does binding energy measure?
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Question #0ef49
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Are OXIDANTS and OXIDIZING AGENTS the same thing?
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How can low temperatures for superconductivity be reached?
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Question #87123
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What mass of oxygen gas can be be produced when 1.15 g sodium peroxide reacts with excess water?
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Question #6f539
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Question #e675f
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Question #5dbac
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Question #d2fe3
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How does concentration effect dynamic equilibrium?
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Question #24a44
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How do elements make up compounds?
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What quantum numbers refer to a 7s orbital?
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How can I calculate wavelength of a photon?
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Question #3d61b
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Why is FeCl3 the product, when Fe and Cl2 reacts and not FeCl2?
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Question #94dc7
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Question #21639
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Question #557f1
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Question #e4180
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Question #bc43f
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How is Keq related to molality?
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Question #8954c
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Question #babca
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Question #16ac1
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Question #85cb9
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Question #a7b16
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Question #f6ebb
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Question #b60b5
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Is magnetic force perpendicular to the magnetic field?
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What is the law of mass action? What determines the direction of a chemical reaction in a formula equation?
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Question #597fc
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What is an example of a thermochemistry practice problem?
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What is the wave particle duality of electrons?
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Has Heisenberg's Uncertainty Principle been proven?
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How can I calculate the molar mass?
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Question #b2485
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How are metals similar to metalloids?
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How does the degree of dissociation affect ka?
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How is the equilibrium constant related to Gibbs free energy?
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How can I calculate osmolarity of dextrose?
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Is a metallic bond the only type of chemical bonding a metal can exhibit?
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Can a polarized object have a net charge of zero?
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Why is positron emission important?
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What conditions must be met in order for a reaction to be considered exothermic?
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What are some examples of orbital hybridization?
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Why do supersaturated solutions crystallize?
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How can I calculate delta G of a reaction?
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How can I explain the difference between quantitative and qualitative methods?
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Why is enthalpy an extensive property?
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What is a galvanic cell made of?
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How does the rate of reaction change when reactants mix?
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How can polar molecules pass through a membrane?
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If the frequency of a wave is 2.0 cycles per second and its speed is 0.04 meter per second,what is the wavelength of the wave?
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How does nuclear energy change into electricity?
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How is dynamic equilibrium related to vapor pressure?
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What is the boiling point elevation?
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Are matter waves the same as de Broglie waves?
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Why are ionic compounds solid at room temperature?
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Which of the following molecules has a dipole moment? CCl4, H2S, CO2, BCl3, Cl2
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What is the ionization of a strong acid?
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Why is ideal gas law important?
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How does atmospheric pressure change in the troposphere?
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Can dynamic equilibrium be disrupted?
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What are some examples of anodes?
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Will a reaction with a negative ΔH° be spontaneous?
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Why is hydrogen included in the metal activity series?
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How many atomic orbitals are there in an h subshell?
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