Master Chemistry with Fun Quizzes & Brain Teasers!

How does a scientific theory compare to a scientific law?
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What information does not need to be included a chemical waste label? Select one: Relative amounts of chemical compounds in the container. The date the waste container was filled completely. A description of the experiment the chemicals were used for. Names of the chemical compounds present in the container.
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Question 1 of 10What is technology?A. An understanding of something new.B. The steps that engineers go through to create a product.C. Something created using science for use by society.D. A method that is used to solve problems,SUBMIT
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Subject is actually science please answer giving brainliest also!
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Acetone molecule polor or nonpolar?
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Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. An industrial chemist studying this reaction fills a 50.0L tank with 14. mol of sulfur dioxide gas and 2.6 mol of oxygen gas, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.6 mol. Calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. Round your answer to 2 significant digits.
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The heat of vaporization for benzaldehyde is 48.8 kJ/mol, and its normal boiling point is 451.0 K. Use this information to determine benzaldehydes vapor pressure (in torr) at 53.5C. Report your answer to three significant digits.
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Question 3What is an area that is claimed by one or moreindividuals?A. PopulationB. Carrying CapacityC. DispersionD. TerritoryAnswer is D
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Question: Can a penny dropped from a building kill a pedestrian below?Hypothesis:Controls:Independent variable:Dependent variable:Conclusion:
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Volume of HCl used 25.0mL 4 lInitial burette reading 0.50mLFinal burette reading 25.60mLConcentration of KOH 1.0Mthe molarityHCl solutionCalculate
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Radioactive americium-241 is used in household smoke detectors and in bone mineral analysis. Give the number of electrons, protons, and neutrons in an atom of americium-241.
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The use of water in a heat exchanger is taking advantage of water's A. high specific heat. B. significant expansion during boiling. C. solid state when frozen. D. polar molecular nature
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The water bottle contains 575 grams of water at 80C. The water eventually cools to40C. How many calories of heat could be transferred to the student's back?
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Does changing the number of protons change the identity of the element you have built ?
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Identify which location in the periodic table you would have thelargest atomic radii.
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HELP ME ASAP PLEASE IDK THIS
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You are trying to confirm that your bottle of hydrochloric acid is supposedly 1.0 M, as labeled. You decided to perform a titration with 1.3 M sodium hydroxide and 100 mL of your hydrochloric acid. You expect to use 77 mL of sodium hydroxide to neutralize the acid, but in the experiment it actually took 89.13 mL of NaOH to reach the endpoint. What is the actual concentration of the hydrochloric acid?
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The distribution coefficient between methylene chloride and water for solute Y is 14. An amount of 72.0 g of Y is dissolved in 180 mL of water. a) What weight of Y would be removed from water with a single extraction with 180-mL of methylene chloride? Report to 1 decimal place. b) What total weight of Y would be removed from water (the original solution) with two successive extractions with 90-mL portions each of methylene chloride?
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Determine each type of reaction. 2 C 2 H 2 ( g ) + 5 O 2 ( g ) 4 C O 2 ( g ) + 2 H 2 O ( l ) 2CX2HX2(g)+5OX2(g)4COX2(g)+2HX2O(l) Choose... N H 4 N O 3 ( s ) N 2 O ( g ) + 2 H 2 O ( l ) NHX4NOX3(s)NX2O(g)+2HX2O(l) Choose... C O ( g ) + 2 H 2 ( g ) C H 3 O H ( l ) CO(g)+2HX2(g)CHX3OH(l) Choose... 2 F e ( s ) + 6 H C l ( a q ) 2 F e C l 3 ( a q ) + 3 H 2 ( g ) 2Fe(s)+6HCl(aq)2FeClX3(aq)+3HX2(g) Choose... C a C l 2 ( a q ) + N a 2 C O 3 ( a q ) 2 N a C l ( a q ) + C a C O 3 ( s ) CaClX2(aq)+NaX2COX3(aq)2NaCl(aq)+CaCOX3(s) Choose...
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Using Gizmo ,describe the main use for each fuel Coal: Petroleum: In each case, what is the end product of burning the fossil fuel,and where does it go? Help is for today
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Suppose the reaction Ca3(PO4)2 + 3H2SO4 3CaSO4 + 2H3PO4 is carried out starting with 149 g of Ca3(PO4)2 and 86.9 g of H2SO4. How much phosphoric acid will be produced?
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The growth of a certain plot was measured over a period of more than a month. How many centimeters did the plant grow between day 10 and day 30. 0.5 cm 1.0 cm 1.5 cm 2 cm
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The density of wind-packed snow is estimated to be 0.35 g/cm^3. A flat roof that is 35 by 43 feet has 28 inches of snow on it. How many pounds of snow are on the roof?
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Research Hypatia's achievements in the worldof science. What is she most known for?Write down three interesting facts about herlife.
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