Master Chemistry with Fun Quizzes & Brain Teasers!

you run a reaction which will make ammonia (nh3) as a product. you predict that you should make 8.41 x 1024 molecules of ammonia in your reaction. how many grams of ammonia will you make if your prediction is correct?
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calculate the concentrations of all species present in a 0.29 m solution of ethylammonium chloride (c2h5nh3cl).
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how many pgal molecules will it take to make one molecule of glucose? justify your answer with a discussion of numbers of carbon atoms.
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What other information do you need in order to determine the molecular formula from the empirical formula of a compound?
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predict the major organic product formed upon treatment of the following diene with hydroiodic acid under cold conditions. be sure your answer accounts for regiochemistry and stereochemistry, where appropriate.
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if the mass ratio of k to f in a compound is 2.06, how many grams of f are needed to react with 2.30 of k?
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which is an adverse reaction that would require the process of weaning from a ventilator to be terminated?
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as an immediate precautionary measure, how far should you isolate the leak area in all directions? qzuilet
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a metal worker melts 65g of solid lead to make finish sinkers. calculate the energy change during melting. (thee heat of fusion of lead is 4.64kj/mol)
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if the half life of carbon-14 is 5730 years, and you have a sample that has lost 80% of its carbon-14, how old is the sample?
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a 5.00 g sample of acrylic glass, which is sometimes used as a break-resistant glass substitute, contains 3.57 g of carbon, 0.48 g of hydrogen, and 0.95 g of oxygen. what is the percent composition of acrylic glass?
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which set of elements is arranged in order of increasing electronegativity? which set of elements is arranged in order of increasing electronegativity? ga < ge < p < n p < n < ge < ga ge < n < ga < p n < p < ge < ga
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what atomic property of cscs is most responsible for its high reactivity? what atomic property of is most responsible for its high reactivity? high melting point small atomic size low ionization energy high zeffzeff
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g two nuclei of 40ca (atomic number 20) undergo fusion to form a nucleus of 80 zr (atomic number 40). the total binding energy of 40ca is b. what would be the best estimate for the total binding energy of 80 zr?
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the enthalpy of sublimation for a particular compound at 25.0 c is 32.4 kj/mol. the enthalpy of fusion for this compound at its melting point is 10.4 kj/mol. calculate the enthalpy of vaporization for this compound.
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a compound is found to be 64.9% carbon, 13.5% hydrogen and 21.6% oxygen. if its molecular mass is 74 g/mol, the molecular formula is
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1) write a balanced equation to show the hydrolysis of glycerol tristearate (tristearin, a triple ester of glycerol) using water and sodium hydroxide to make soap. in addition to the molar ratios, give the mass ratios, i.e., the ratios of masses that react according to the reaction stoichiometry) based on 20 g of tristearin.
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overall, the physical properties of minerals provide a reliable means to identify common minerals. however, certain properties can exhibit a range of characteristics or values making them less useful for identification purposes. choose three physical properties that might vary considerably between samples of the same mineral and explain why such variability would exist.
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In radioactive decay, with each successive half-life, half the remaining sample decays to form anothera. nucleusb. protonc. elementd. life-form
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How does transfer of thermal energy by radiation differ from convection and conduction?
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Classify the components as most accurately describing cofactors, coenzymes, or neither. Cofactors Coenzymes Neither Answer Bank lipase inorganic ion ascorbic acid CoQ FAD
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In which type of rock would a scientist most commonly find a fossil of a triceratops?
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Which equation is correct?A) mechanical energy = kinetic energy-potential energy B) mechanical energy = potential energy - kinetic energy C) mechanical energy = kinetic energy + potential energy D) mechanical energy = kinetic energy x potential energy Pls help Im dying
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How many atoms of oxygen are there in 2Al2(SO2)3
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