Answers edited by Stefan V.
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Question #0efc9
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Question #185b5
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Which following pairs of atoms, have a lower electron affinity? a) Ca,K b) I,F c) Li, Ra. I seriously don't know anything about electron affinity all ik that it can buy another element
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Question #765f8
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How do you factor #2t^2+7t+3#?
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In what process do animals use glucose and oxygen?
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What are good programs for drawing chemical structures?
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How are transverse waves formed?
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What is the expression of the solubility product constant of tin(IV) phosphate?
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What do these sets of quantum numbers describe?
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How to calculate the root mean square speed, vrms, in m·s^-1 at 227 Celsius and 900 torr, of a gas having a molar mass of 16.0 g·mol^-1 ?
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Question #d138d
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Question #16078
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What are chloroplasts?
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What steps can you do to figure out a chemical reaction from Dalton's gas law if given only the data? P atm= 656.7, T h20= 27 C, V initial= 0.30 mL, V final = 17.05 mL and mass of Alka-seltzer 0.123g.
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The root-mean-square speed of a gas is found to be 391.2 m/s at 270 K. The gas is ?
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What is the concentration of the predominant form of #"H"_3"A"# at pH 10.5?
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1.553g of a monoprotic acid (MM = 97.10 g/mole) dissolved in 75.00mL of D.I. water was titrated with KOH. At the endpoint, 35.28 mL of KOH was consumed. Calculate the molarity of KOH?
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What happens on the cathode during the electrolysis of a copper(II) sulfate solution?
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Suppose I am trying to determine a compound that has 15.87% carbon (C), 2.15 % hydrogen (H), 18.5% nitrogen (N), & 63.41% oxygen (O) (n.b., this does not equal exactly 100%): what is the empirical formula of the compound?
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Question #85471
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A certain gas has a density of 1.30 g/L at STP. What will its density, in g/L, be at 546 K and 380 torr pressure ?
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Question #1935e
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Each 5-mL portion of Maalox contains 400 mg of magnesium hydroxide, and 40 mg of simethicone. If the recommended dose is 2 teaspoons 4 times a day, how many grams of each substance would an individual take in a 24-hour period? (1 teaspoon= 5 mL)
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Methane, CH4 , the major component of natural gas burns in air to form CO2 and H2O. What mass of water is formed in the complete combustion of 5.00 x 103 g of CH4?
Why is the answer: 11.2 kg.
Thank you.
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Is I-131 more likely to undergo beta-decay or positron-decay?
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Question #8fb51
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Question #cbd61
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Question #508d0
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Is hydrogen the only element to react to produce a duet of valence electrons?
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Question #dde3a
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Question #e888d
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How can I learn the valencies of the first #20# elements?
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Consider a steel container filled with 40.0 g of helium gas and 40.0 g of argon gas. What is the ratio of pressures that each gas exerts (helium:argon)?
a) 1:1
b) 10:1
c) 1:10
d) 9:1
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Question #4d493
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Question #0ef97
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How many liters of hydrogen gas are produced at STP from the decomposition of #"70.0 g"# of hydrogen chloride?
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How much would a dosage of 12ml 10% Potassium Iodide (KI) w/v solution increase Iodide levels in a total voluve of 800 liters?
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Question #b7884
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Gallium has an atomic mass of 69.723. The Ga-69 (68.926 amu) is 60.11%. What is the amu of the other isotope? I'd like to know the set up-thought it was (69.723)(0.6011) + (x)(0.3989)? But it isn't giving me the right answer.
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Question #d7700
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Question #90f72
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How do you balance the acid equation #"MnO"_4^"-" + "H"^"+" + "HSO"_3^"-" → "Mn"^"2+" + "SO"_4^"2-" + "H"_2"O"#?
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How do you prove that the circumference of a circle is #2pir#?
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Question #6ea84
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Question #da09a
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Question #269be
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What are some examples of balancing redox equations using the oxidation number method?
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Question #398ea
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Why is the propane that used as a fuel in a BBQ gas at room temperature, but 2-propanol used as rubbing alcohol is a liquid at room temperature?
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Question #a2716
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Question #a6f4d
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What is the net charge of a helium atom?
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Question #e51aa
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Question #c23aa
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Question #5ca00
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Question #7b856
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Question #ab798
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Question #9541d
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Question #69f05
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Question #6ca0b
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Question #d6441
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Question #0fd26
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What is the IUPAC(chemical name) of PH3? Wouldn't it be phosphorous hydride because it's not molecular(there is a metal and non-metal). I searched online, it says it's Phosphorous trihydride?
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H2S (g) concentrations of 660ppm is dangerous. (6) H2S generators continually release all of the gas they can every 15 minutes & the gas is never vented out of a room (vol 198,200L). How long will it take the H2S (g) concentration 2 reach dangerous level?
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How can I draw the more stable chair conformer of trans -1-ethyl-2-methylcyclohexane?
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Question #ac0f8
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What do call the curved surface of water in a measuring cylinder?
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Question #3524f
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Question #94ccb
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Question #d871b
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Question #0b93d
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Question #bc43f
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Question #1887e
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How can I draw the cis-1-bromo-3-methylcyclohexane chair conformation?
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Is potassium iodide an ionic or covalent compound?
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Question #c96db
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Octane (C8H18, 114.23 g/mol). The density of octane vapour 125.0 Celsius and 720.0 torr is ? and what would be the volume be if it was 2.00 moles ?
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Question #bbfad
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Question #12fd0
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Question #6dd9c
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Why is the enthalpy of formation of oxygen zero?
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Question #d35f2
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