Chemistry

what is the radioactive nucleus before it decays
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At what temperature will a gas be, if you allow it to expand from its original volume of 756 mL at 65.0 C to 1.40 L? (hint volume needs to be the same)
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How many moles of sugar, C12H22O11, are in 52 mL of a 0.50 M solution?
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A 5.72-L football is filled with air at 1.85 atm. At the same temperature, the volume of the football is reduced to 2.13 L. What is the pressure of air in the ball?
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a. What is the atomic weight of one mole of CH4?b. How many moles in 64 grams of CH4?
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What is an oxidizing agent ?
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Which of the following are characteristics of heterogeneous mixturesA. distinguishable components B. evenly distributed components C. particles too small to be seen with a microscope D. components in varying proportions E. particles that may settle
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balancing equations
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how many elements are in 2CaCO3 pls help
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does temperature and pressure affect the solubilty of any solute
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A solution of KOH has a [OH-] concentration of 0.045 M. What is the pOH of the solution? *1 point-1.31.31.10.90what is the answer?
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formula of silver nitrite
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Complete and balance this neutralization reaction: HNO3 + Al(OH)3
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If you made 6 moles of NO2 how many grams of N2 did you use?
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Consider the equation for acetic acid plus water HC2H2O2 + H2O --> C2HcO2- + H3O+ a)compare the strengths of the two acids in the equation. Do the same for the two bases. b) Determine which direction -- forward or reverse -- is favored in the reaction.
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Will a reaction occur in KCl +Br2= KBr + Cl2
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Leonard adds 5 grams of sugar to 1 liter of water to make one sugar solution. Then he adds 10 grams of sugar to 1 liter of water to make another sugar solution. Which statement correctly compares these solutions?
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ipt Which of the following is true about semipermeable membranes?A. A semipermeable membrane allows passage of solute particles but not solvent particles.B. A semipermeable membrane allows passage of solvent particles but not solute particles.C. A semipermeable membrane allows passage of both solvent and solute particles.D. A semipermeable membrane does not allow passage of either solvent or solute particles.
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________________ substances have an equal amount of H+ and OH- ions in solution.
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HELP PLEASE ILL GIVE 25 pointsWhich of the following practices could help reduce erosion of water banks? a. buffer strips b. natural fertilizers and pesticides c. decrease in fossil fuel emissions d. all of the above Please select the best answer from the choices provided A B C D
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the perimeter of a isosceles is 48 meters. the upper base is 12 meters shorter than the lower base x.each leg is 12 meters shorter than the lower base x. each leg is 12 meters shorter than the lower base. write the equation of the perimeter in terms of x.
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to breed or train; to tame a wild animal to livewith humans.
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You are given the reaction Cu + HNO3 Cu(NO3)2 + NO + H2O complete the final balanced equation based on half-reactions
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You are in the room with several objects, the temperature in the room is 21 celcius, what can you assume about the temperatures of the objects in the room?
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