Master Chemistry with Fun Quizzes & Brain Teasers!

How much would a 100 kg man weigh on the surface ofthe Sun, where the acceleration due to gravity is 274 m/s?A. 10,000 NB. 36,985 NC. 27,400 ND. 98 N
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If someone weighs 711 N on Earth, what is that person'smass?A. 71.1 kgB. 70.0 kgC. 72.6 kgD. 73.5 kg
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A new element has been added to the Periodic Table. It is most comparable to the Alkaline Earth Metals (like Calcium and Magnesium). How many electrons does it likely have in its outer shell? How can you tell?
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What percentage is the smell from monomer on the Paper towel
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write a paragraph using the words atom, element, compound, and mixture.
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Ca(s)+2HCL(aq)---> CACL(two)(aq) +H(two)(g)Can anyone tell me how to say it in words eq?
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Whenever Ayan returns from school he empties his water bottle in the potted plant insteadof throwing it in the sink. He always says his housemaid to use the water for watering plantsin the garden after mopping the house.(a) Can you suggest any other use of the water left after mopping?(b) What is the function of water in plants?(c) What values of Ayan is shown here?
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Matter includes all of the following EXCEPT-Osmokewater vaporlightair
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Cations are formed when neutral atoms lose neutrons positrons protons electrons
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FILL IN THE BLANK adam is trying to identify a solid. he places a small amount of the substance in an acid solution and observes whether or not a reaction takes place. this test is based on a_________ property.
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FILL IN THE BLANK in carboxylic acid derivatives, the heteroatom z stabilizes the functional group by resonance. the more basic atom z is, the _______readily it donates its electron pair and the________stable the coz group will be.
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A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gaseous products. Thie cylinder has a piston that moves in or out, as necessary, to keep a constant pressure on the mixture of 1 atm. The cylinder is also submerged in a large insulated water bath. (See sketch at right.) From previous experiments, this chemical reaction is known to release 390. kJ of energy The position of the piston is monitored, piston during the reaction and it is determined from this data that the system does 117-kJ of work on the piston during the reaction. is the reactio exothermic or endothermic ? O exothermic O endothermic Does the temperature of the water bath go up ar down? O up O down O neither Does the piston move in or out? O in O out O neitherDoes heat flow into or out of the gas mixture? O in O out O neither How much heat flows? Round your answer to 3 significant digits
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Identify which of these molecules has the highest boiling point and give the reasoning why in terms of intermolecular force. H2O, KCl, CO2
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Alcohol dehydrogenase catalyzes the conversion of methanol to _________ and is,therefore, classified as a(an)________.A) acetic acid; transferaseB) formaldehyde; oxidoreductaseC) acetic acid; oxidoreductaseD) ethanol; lyaseE) formaldehyde; transferase
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Atoms of most nonmetallic elements achieve noble-gas electron configurations by gaining electrons to become __ or a negatively charged ions
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As a falling rocket plunges toward the event horizon, an observer in the orbiting rocket would see that the falling rocket ______.
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which of the following options correctly describe the mechanism of the reaction between a nucleophile and an acid chloride? select all that apply.
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consider combustion of ch4 with 02 forming co2 and h20 as the products. find the equilibrium constant for the reaction at 1000 k. use an average beat capacity of cp
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a chemistry student weighs out of chloroacetic acid into a volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with solution.
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Number of electrons it must lise to have 8 valance electron. Element ? Number electron?
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what special equipment did niels bohr use to develop his atomic model?
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water is a polar molecule because: in the o-h bonds of water, the oxygen is more electronegative. the electrons in the o-h bond spend more time close to the oxygen. it has asymmetrically arranged polar bonds. water molecules have permanent electric dipole moments. the hydrogens have a partial positive charge, and the oxygen has a partial negative charge.
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using the bohr model of the atom, determine the photon energy involved in the transition of a hydrogen atom's electron from the n
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1-Methylcyclopentanol is classified as ________.a.a primary alcoholb.a secondary alcoholc.a tertiary alcohold.a phenole.an enol
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