Master Chemistry with Fun Quizzes & Brain Teasers!

In a boiling pot of water are a metal spoon and a wooden spoon of equal masses/size. Which spoon would likely be more painful (higher in temperature) to grab? Assume that both spoons have been in the same pot of boiling water for the same amount of time. Explain this phenomena using the following terms: Heat, Mass, Temperature, Specific Heat Capacity, Heat Flow. Consider all possible factors in your explanation
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Write the following chemical reactions and balance:Potassium reacts with sodium oxide to produce potassium oxide and sodium
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A solution is prepared by dissolving 8.50 g of c6h12o6 in 4.15 g of cyclohexane. what is the % mass of c6h12o6 in the new solution? round your answer to 1 decimal places.
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C (g) + e (g) 2 w (g)initially, there are 3.5 moles of w placed in a 2.5 l evacuated container. equilibrium is allowed to establish and the value of k = 2.34 e-5 for the reaction under current conditions. determine the concentration of e at equilibrium. a. [e] = 8.352 e -6b. [e] = 0.00578c. [e] = 0.00289d. cannot solve using 5% approximation rule
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A 2. 50g sample of zinc is heated, then placed in a calorimeter containing 60. 0g of water. The temperature of water increases from 20. 00 degrees C. The specific heat of Zinc is 0. 390J/g Degree C. What was the initial temperature of the zinc metal sample?
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A quantity of gas is at a temperature of 20C, a pressure of 760 torr and occupies a volume of 2. 00 L. If the pressure is changed to 730 torr, what will be the new volume? Assume that there is no temperature change
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HOH14----IList the number of each atom in the formulas above:H -----LI DONE H-----II H
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A 20. 0 g lead ball is heated in a Bunsen burner to 705 degrees celsius. It is then dropped into a 500. 0 g water bath. What is the initial temperature of the water if the final temperature is 35 degrees celsius? The C of lead is 0. 13 J/g degrees C. [ Remember: Ch2o = 4. 18 J/g degrees celsius]
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At a festival, spherical balloons with a radius of 140cm are to be inflated with hot air and released. The air at the festival will have a temperature of 25 C and must be heated to100 C to make the balloons float. 1. 00kg of butane(C4H10) fuel are available to be burned to heat the air. Calculate the maximum number of balloons that can be inflated with hot air
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What is the mass of a sample of NH3 containing 3. 80 10^24 molecules of NH3?
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Question 1 (2 points)2. 5 L of a gas is heated from 200 K to 300 K. What is the final volume of the gas?
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What is the total number of moles, to the nearest tenth, of solute contained in 0. 50 liter of 3. 0 M HCl?
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What relationship is described by the arrhenius equation, k = ae -(ea / rt)?
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.calculate the osmolarity of the following solutions, are these solutions hypotonic solution, isotonic solution, or hypertonic solution?(a) osmolarity of 0.069 m na2co3 is ___, this solution is a ___ solution (hypotonichypertonic, or isotonic)(b) osmolarity of 0.62 m ai(no3)3 is ___, this solution is a ___ solutionthis solution is a(c) osmolarity of a 0.30 m glucose (c6h1206) aqueous solution is ___, this solution is a ___ solution
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Find the hydroxide concentration of a lioh soultion that has a poh of 4.80.[oh] = (round to 2 decimal places)
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3. Suppose you had titrated your vinegar sample with barium hydroxide instead of sodium hydroxide:Ba(OH)2(aq)+2CH3COOH(aq)Ba(CH3COO)2(aq)+2H2O(l)Consider a 0. 586 M aqueous solution of barium hydroxide,What volume (in mL) of 0. 586 M Ba(OH)2 solution are required to neutralize 10 ml of vinegar containing 2. 78 g of acetic acid?
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Calculate the mass of iron that releases 2432 J of energy as its temperture rises from 25. 0 degrees * C to 87. 0 degrees * C. (The specific heat of iron is 0. 448 J/g^ C)
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1. in a laboratory experiment, an undergraduate student collected a sample of ammoniumphosphate. if the sample contains 9.52 x 1025 molecules, how many grams of the sample did hecollected?
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If I contain 25 grams of argon in a container with a volume of 60 liters andat a temperature of 400 K, what is the pressure inside the container?
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If you had a 32 gram sample of C-14 today, how much would remain in 10,470 years? Remember, the half-life is 5370 years
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How do you exhibit a gas for others especially during the holy week and this time of pandemic? Make a reflection paper
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The particles of a gas effuse 2. 76 times faster than particles of CCl4 at the same temperature. What is the unknown gas?
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If 450 ml of water are added to 550 ml of a 0.75 m k2so4 solution, what will the molarity of the diluted solution be?
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What is volume? a. How close particles are stuck together b. The amount of space occupied by matter c. The amount of particles in any given object d. The weight of an object Please select the best answer from the choices provided
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