Chemistry

If the mole fraction of sulfuric acid H2SO4 is 0.432 what is the percent by mass of H2SO4.
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Do metals or nonmetals have the greatest tendency to lose electrons and become positive ions?
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what is the type of bonding for ammonium lauryl sulfate?
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Over the past century, the percent of squirrels in the vicinity of Washington, DC, that are black instead of the more common gray has been continually increasing.Which of the following statements best explains why this is happening?A.Black squirrels are more visible against tree trunks than gray squirrels.B.Black squirrels are more popular with tourists than gray squirrels.C.Gray squirrels are more comfortable with humans than black squirrels.D.Black squirrels have a survival advantage over gray squirrels.
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How many kilograms of solvent (water) must 0.71 moles of KI be dissolved in to produce a 1.93 m solution?
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11. Calculate the energy required to produce 12.00 mol of CI207 on the basis of thefollowing balanced equation.2012(g) + 702(g) + 130 kcal yields 201207(9)
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When an electric circuit operates a buzzard makes a sound what happens to the electric charges in the circuit
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The strong nuclear force is always smaller than the electrostatic force true or false
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A 52-gram sample of water that has an initial temperature of 10.0 C absorbs 4,130 joules. If the specific heat of water is 4.184 J/(g C), what is the final temperature of the water? (4 points) Group of answer choices 11 C 19 C 29 C 51 C
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Changes in pressure can have a large effect on equilibrium systems containing gaseous components. 1. changing the concentration of gaseous components 2. adding an inert gas has no effect since the gas does not take part in the reaction, all partial pressures stay the same 3.changing the volume of the reaction vessel. This will cause a shift in the equilibrium position if the number of moles of gas is different on the reactant and product side (so n = n products - n reactants)How would you change the volume for each of the following reactions to increase the yield of the product(s)?1. CaCO3(s) CaO(s) + CO2(g) (increase, decrease, no change)2. S(s) + 3F2(g) SF6(g) (increase, decrease, no change)3. Cl2(g) + I2(g) 2ICl(g) (increase, decrease, no change)
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Compare and contrast the dynamics of energy transfer between the Eocene Period and the Cryogenian Period. In which period would you say that Earth's system is experiencing a net gain in energy and in which period would you say that Earth's system is experiencing a net loss in energy
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0.450 moles of K2SO4 are dissolved in 195.0 mL of water. Calculate the molarity of the solution.
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ANSWER IT PLEASE!!!!! A virus is a genome, or set of chromosomes, contained inside a protein capsule called a capsid. A virus can be either a single or double strand of RNA or DNA. Although viruses are made of genetic information, they do not have cells. They also need to attach to a host cell in order to live and reproduce. Host cells can be from animals, plants and even bacteria and fungi. Scientists debate whether or not viruses are considered living organisms. Most agree that viruses are not living.Which of these statements is true based on the information in the passage?
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A gas occupies a volume of 2.45 L at a pressure of 1.03 atm. What volume will thegas occupy if the pressure changes to 0.980 atm and the temperature remainsunchanged? Show your work in the space below. *
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Which of the following is the energy that comes from changes in an atoms nucleus?a. thermal energyb. nuclear energyc. light energyd. electrical
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Which of these is a conversion from chemical energy to mechanical energy?A. A dark light bulb starting to glowB. A ball rolling down a hillC. A person lifting a weightD. A potato being heated in an oven
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Lifting a box off the floor is an example of what type of force? A). Natural B).applied C).frictional D).gravitational
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Oxygen decays to form nitrogen.3150->19N + e81This type of nuclear decay is called
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Body systems such as the nervous and digestive systems work together and help the bodymaintain homeostasis. Which of the following correctly describes one way that the nervoussystem and the digestive system work together?Lungs contract during chewing so that food won't be inhaled.Blood flow to the stomach and intestines decreases during eating.The involuntary muscles in the jaw stimulate spinal cord neurons to initiate chewing.Neurons in the brain stimulate smooth muscles in the intestines to move food through the body.
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What is one thing NOT impacted by AcidRain.GraniteMetalLimestone
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The temperature of a 350. mL sample of gas increases from 27 C to 227 C. What is the final volume of the sample of gas, if the pressure and amount of gas in the container is kept constant?Group of answer choices
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How many joules of heat are needed to raise the temperature of 1.5 g of aluminum at 45C, if the specific heat of aluminum is 0.75 J/gC? Group of answer choices
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In the following reaction, will the [H2] increase or decrease when equilibrium is reestablished after these stresses are applied? N2 (g) + 3 H2 (g) --> 2 NH3 (g) + 22 kJ NH3(g) is added ________ N2(g) is removed ________ 2. Note reaction: 2 NO (g) + H2 (g)N2 O (g) + H2 O (g) + 36 kJ In which direction, left or right, will the equilibrium shift if the following changes are made? NO is added ________ H2 is removed ________ N2O is added ________ H2 is removed ________ 3. In this reaction: CO2 (g) + H2 (g) + heat -->CO (g) + H2 O (g) In which direction will the equilibrium shift if these changes are made? CO is added ________ CO2 is added ________ H2 is removed ________ 4. In this reaction: 2 NO (g) + H2 (g) --->N2 O (g) + H2 O (g) + heatWhat will happen to the [H2O] when equilibrium is reestablished after these stresses are applied? NO is added ________ N2O is removed _________
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Examine the nuclear reaction: H+n H. Why is this classified as a nuclear reaction rather than a chemical reaction?It is not balanced.A new compound is formed.A change has occurred in a nucleus.A new element has been formed.
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