Chemistry

how does the Doppler effect related to the universal expanding?
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.......... water is good for formation of bones and teeth, soft water or hard water?
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IfO2(g) reacts with H2(g) to produceH2O, what is the volume of H2O obtained from 1 L of O2?Hint:Write a balanced equation first!
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ionic compounds conduct electricity in the solid state true or false
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How many moles of gold are Cleveland to 1.2041024 atoms
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In a nuclear reaction, which of the following must be conserved?A. energyB. massC. chargeD. the number of electrons
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Methanol (CH3OH) is the simplest of the alcohols. It is synthesized by the reaction of hydrogen and carbon monoxide CO(g)+2H2(g)=CH3OH If 500 mol of CO and 750 mol of H2 are present, which Is the limiting reactant?
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What is the specific heat values for all the metals.
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what could be used to buffer vinegar?floursugarbaking sodasalt
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Can someone answer #6 also please show work!
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Describe how alleles and genes are related.
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A gas occupies 11.2 liters at 0.860 atm. What is the pressure if the volume is doubled?
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In an experiment, 10.6 grams of steam is produced and then cooled. If the heat of vaporization is 2,257 joules/gram, how much energy is released after all the vapor turns to liquid?
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The molecule BF3 is an example of a resonance structure. TRUE O FALSE
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La aspirina se prepara haciendo reaccionar cido saliclico con exceso de anhdrido etanoico. En un experimento, 50.05 g de cido saliclico se convirtieron en 55.45 g de aspirina. Cul fue el porcentaje de rendimiento?
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The Earth's mantle isA. hotter than the crust but cooler than the core.B. hotter than both the crust and the core. C. cooler than both the crust and the core. D. cooler than the crust but hotter than the core.
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A solution has a [H3O+] of 1x 10-5 M. What is the [OH-] of the solution? (5 points)9M14M1x 10-'M1x 10-14M
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Na2CO3 is a/an ____________ compound where its electrons are _______. *1.covalent, shared2.covalent, gained/lost3.ionic, gained/lost4.ionic, shared
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Static electricity is the buildup of electric charges. Which of the following is an example of the natural discharge of static electricity? A. ocean wavesB.earth's magnetic polesC. northern lightsD. lightning
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How many grams do 4.8 x 1026 atoms of siliconweigh?Answer in units of g.
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The diagrams show objects gravitational pull toward each other. Which statement describes the relationship betweendiagram X and Y?A)Gravity attracts only larger objects toward one anotherB)Gravity attracts larger objects only if they are dose toone anotherC)If the masses of the objects increase then the forcebetween them also increases,D)If distance between the objects increases, then theamount of force also increasesNeed help plzzz
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help asap plzzz! Which of the following diagrams is the correct electron dot diagram for S?
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The process by which complex compounds are broken down by enzymes and by which many organic alcohols are formed is called
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8. Which of the following energy sources is relatively expensive to set up. but has a low cost once it is in place?A. natural gasB. coalC. nuclear powerD. solar power
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