Master Chemistry with Fun Quizzes & Brain Teasers!

Assume you have 5. 0g of mg(s) reactant. calculate how much hcl(aq) you would need to use in order to ensure that hcl is not the limiting reactant. your final answer should be in ml of hcl. a. 82ml hclb. 41ml hclc. 410ml hcld. 205ml hclassume you have 5. 0g of mgo(s) reactant. calculate how much hcl(aq) you would need to use in order to ensure that hcl is not the limiting reactant. your final answer should be in ml of hcl. a. 50. ml hclb. 25ml hclc. 250ml hcld. 125 ml hcl
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Na2co3(aq) + cocl2(aq) --> express your answer as a chemical equation. enter noreaction if no precipitate is formed. nothing
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What additional product completes the model?A. Carbon-8B. Helium-4C. Helium-8D. Carbon-4
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2al + 6 hcl 2 alcl3 + 3h2 hrxn = -152 kjhow much heat energy is associated with the reaction of 35 g of aluminum with excess hydrochloric acid?
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If a gas occupies 30 L at STP, what would be the volume if the temperature was raised to 323. 15K ?
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Use S1/P1 = S2/P2 , the solubility of a gas is 2. 36 g/L at a pressure of 345 atm. What is the solubility if the pressure increases to 445 atm at the same temperature?
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In the equation:2h2 + o2 + 2h2oa. 1 l of hydrogen reacts with 2 l of oxygenb. 1 l of hydrogen reacts with 22.4 l of oxygen.c. 22.4 l of hydrogen react with 1 l of oxygend. 2 l of hydrogen react with 1 l of oxygen
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How much energy is needed to change 475. 0 grams of liquid water at 40. 0C to steam at 100. 0C?
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27. Identify the particles that facilitate the electric conductivity of the following substances (1) Sodiun metal (ii) Sodium Chloride solution (iii) Molten Lead Bromide
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You have twisted your ankle and need to apply a cold pack. You squeeze the bag and as the chemical reaction occurs, you can feel that the pack is getting colder. How would you classify this type of reaction? Using what you understand from our lessons in unit 4, explain how the heat transfers between the cold pack and your skin? Also, describe how the law of conservation of energy applies to this system
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1. How many moles does 8. 19 L of gas at STP represent?2. How many moles does 21. 7 L of gas at STP represent?
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How many grams of K2SO4 should be used to prepare 2. 25 L of a 0. 400 M solution
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A solution consisting of 11. 4 g NH4Cl in 150 ml of water is titrated with 0. 20 M KOH. a. How many milliliters of KOH are required to reach the equivalence point?b. Calculate {Cl-], [K+], and [NH3] at the equivalence point. Assume volumes are additive
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A 0. 225L solution of H2CO3 is neutralized by 0. 0880L of a 1. 22 M Fe(OH)3 solution. What is the concentration of the H2CO3 solution?
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4 pointsA solution consists of 2. 50 moles of NaCl dissolved in100. Grams of H20 at 25C. Compared to the boilingpoint and freezing point of 100. Grams of H20 atstandard pressure, the solution at standard pressurehasA) a lower boiling point and a higher freezing pointB) a higher boiling point and a lower freezing pointC) a higher boiling point and a higher freezing pointD) a lower boiling point and a lower freezing point
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How many moles of n2 (g) are present in 1. 00 l of n2 (g) at 100. c and 1 atm?______ moles
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A gas at 850. mmhg occupies 1.5 l. the temperature is raised from 15 c to 35 c causing the volume to change to 2.5 l. what is the final pressure of the gas?
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What is the correct equilibrium expression for the dissociation of the base pyridine: C5H5N + H2O C5H5NH+ + OH-A. Kb = [C5H5NH+][OH-] / [C5H5N]B. Kb = [C5H5N][OH-] / [C5H5NH+][H2O]C. Kb = [C5H5NH+][OH-] / [C5H5N][H2O]D. Kb = [C5H5NH+][C5H5N] / [OH-]E. Kb = [C5H5N][OH-] / [C5H5NH+]
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The question is in the picture
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A 7.32 l tire contains 0.448 mol of gas at a temperature of 28c. what is the pressure (in atm) of the gas in the tire?
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1. In a purple camote peel soaked with rubbing alcohol overnight and steel wool vinegar supernatant liquid. What is the explanation of the reaction or result when you add 2 teaspoons of supernatant liquid in the purple camote peel extract soaked with rubbing alcohol?2. In flower alcoholic extract, bougainvillea petal soaked with rubbing alcohol overnight. What is the explanation of the reaction or result when you add 2 teaspoons of supernatant liquid in the flower alcoholic extract?
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.if you dilute 0.20 l of a 3.5 m solution of lici to 0.90 l, determine the new concentration of thesolution.
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A 29. 7-gram piece of aluminum is sitting on a hot plate. A student accidentally left the hot plate on. The aluminum now is very hot and has to be cooled. You fill a beaker with 250 grams of water. The aluminum is placed in the water. You are curious so you place a thermometer in the beaker. The water warms from 22. 3 C to 30. 8 C. The C (aluminum) is 0. 900 J/gC, and the C (water) is 4. 18 J/gC Do you have enough information to calculate the amount of energy transferred in this situation? Explain in 2-3 complete sentences
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A hiker inhales 598 ml of air. if the final volume of air in the lungs is 612 ml, at a body temperature of 37 degrees celsius, what was the initial temperature of the air in degrees celsius? explain.
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