Master Chemistry with Fun Quizzes & Brain Teasers!

What is the mass of 6.02*10^24 molecules of hydrogen, h2? The molar mass of h2 is 2.02 g/mol.
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Sort the following molecules based on whether or not they are biologically occurring ketone bodies. Drag each item to the appropriate bin.View Available Hint(s) Reset Help B-hydroxybutyrate ethyl methyl ketone acetone acetoacetate 2-butanone 2.pontanone Biological ketone bodies Nonbiological IcetonesPrevious question
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which scientist helped develop the current model of the atom which states that electrons are located in regions known as orbitals of electron clouds?
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which scientist developed the planetary model that stated electrons were found in specific energy levels around the nucleus?
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Which scientist help developed the current model of the atom which states that electrons are located in regions known as orbitals or electron clouds?
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What is the percent by mass of oxygen (O) in NaHCO3?
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true or false:all elements with high ionization energy also have high electron affinity
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Nitrosyl chloride, NOCl, dissociates on heating as shown below. When a 1.50 gram sample of pure NOCl is heated at 350oC in a volume of 1.00 liter, the percent dissociation is found to be 57.2%. Calculate Kc for the reaction as written.NOCl(g) NO(g) + 1/2 Cl2(g)
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what is the simplest formula of a solid containing a, b, and c atoms in a cubic lattice in which a atoms occupy two corners and one body-center position, the b atoms occupy two corners, and the c atoms occupy four corners and two faces of the unit cell?
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assume there exists some hypothetical metal that exhibits ferromagnetic behavior and that has 1 simple cubic crystal structure, and atomic radius of 0.130 nm and a saturation flux density of 0.75 tesla. determine the number of bohr magnetons per atom for this material
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dinitrogen tetroxide and hydrazine (n2h4) undergo a redox reaction in which nitrogen and water are formed as products. what mass of nitrogen could be produced when 50.0 g of dinitrogen tetroxide and 45.0 g of hydrazine are combined? report your answer to the appropriate number of significant figures.
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sulfur hexafluoride gas is collected at in an evacuated flask with a measured volume of . when all the gas has been collected, the pressure in the flask is measured to be . calculate the mass and number of moles of sulfur hexafluoride gas that were collected. be sure your answer has the correct number of significant digits.
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how do you think these partial charges affect the way a water molecule interacts with another nearby water molecule? answer
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according to the building-up principle or aufbau principle, which subshell is typically filled next after the 6s subshell?
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ithium reacts with water to form lithium hydroxide. what mass of lithium is required to produce 12 g of lithium hydroxide?
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consider a solution containing 0.100 m naf and 0.126 m hf. calculate the concentration of fluoride ion after addition of 5.00 ml of 0.100 m hcl to 25.0 ml of this solution.
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is a chemist has 1.87 moles of na2o and causes it to decompose into its constitiuent elemtns how many moles of na will form
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a solution of cacl2 in water forms a mixture that is 38.5% calcium chloride by mass. if the total mass of the mixture is 263.8 g, what masses of cacl2 and water were used?
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which intermolecular force(s) attract hexane molecules to one another in a liquid sample of pure hexane, c6h12 (l) (condensed structural formula: ch3-ch2 ch2-ch2-ch2-ch3)?
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potassium dichromate, k2cr2o7, is used in tanning leather, decorating porcelain, and water proofing fabrics. calculate the number of chromium atoms in 78.82 g of k2cr2o7..
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using only reactants, what is the rate law for the reaction a 2b c --> ab2c ? step 1: a c --> ac (fast) step 2: ac b --> abc (slow) step 3: abc b --> ab2c (fast)
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a 2.00g sample of limestone was dissolved in hydrochloric acid and all the calcium present in the sample was converted to ca2 (aq). excess ammonium oxalate solution, (nh4)2c2o4(aq), was added to the solution to precipitate the calcium ions as calcium oxalate, cac2o4(s). the precipitate was filtered, dried and weighed to a constant mass of 2.43g. determine the percentage by mass of calcium in the limestone sample.
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would you expect manganese(ii) oxide, mnomno , to react more readily with hf(aq)hf(aq) or naoh(aq)naoh(aq) ? would you expect manganese(ii) oxide, , to react more readily with or ? hf(aq)hf(aq) naoh(aq)naoh(aq) they react equally cannot be determined
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what is the iupac name of the following compound? multiple choice 4-hydroxy-3-methylbutanoic acid 3-hydroxy-2-methylbutanoic acid 1-hydroxy-2-methylbutanoic acid 3-(hydroxymethyl)butanoic acid
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