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A sponge and a bar of soap occupy the same amount of space, but the soap is much more dense than the sponge? The soap has a greater volume than the sponge. The soap has more mass than the sponge. The
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What are some applications of the field of spectroscopy? Check all that apply. for identifying elements in a sample for determining the distance and velocity of galaxies for producing neon lights for
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Identify the number of significant figures (sig figs) in each of these values. note: if any part of this question is answered incorrectly, a single red x will appear.
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Calculate the cal (kcal) in 1 cup of whole milk that contains 12g of carbohydrates, 9g of fat and 9g of protein
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A subset of patients with DLD deficiency experience muscle cramps after exercise. Based on your knowledge of the regulation of glycolysis and/or TCA why would this symptom appear. HINT: your answer
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A 48.10-mL sample of an ammonia solution is analyzed by titration with HCl. The reaction is given below. NH3(aq) + H +(aq) → NH4+(aq) It took 39.56 mL of 0.0963 M HCl to titrate (react completely wi
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A 100.0-ml sample of water is heated to its boiling point. how much heat (in kj) is required to vaporize it? (assume a density of 1.00 g>ml.)
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How much heat energy is produced by 0.5 Wh of electrical energy? A. 2.6 Btu B. 0.4 Btu C. 1.7 Btu D. 0.15 Btu
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The pk of phospohirc acid is 7.21. what isthe useful buffering range of this acid and its conjugate base
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Titanium has an atomic number of 22. The following orbital notation for titanium is incorrect. Explain the error in terms of the rules for electron arrangements. Titanium: 1s is filled. 2s is filled.
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As cold air rises, warm air moves in to take its place and creates movement we feel as wind. The meeting of air masses with the same temperatures often brings rain and storms.
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Calculate the amount of heat required to heat a 3.9 kg gold bar from 24 ∘ C to 67 ∘ C . Specific heat capacity of gold is 0.128 J/ g ∘ C .
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Scientists previously referred to the long-ago deposited plant and animal remains, now buried, compacted, and transformed into coal and oil, as the dead-end of the carbon cycle. Since the Industrial R
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I cannot seem to get past this Chemistry question. I know I'm missing a step, as I'm able to complete 80% of it. What I'm I missing? Please solve and explain the steps to me!
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A solution is made by dissolving 10.20 grams of glucose C6H12O6 in 355 grams of water. What is the freezing point depression of the solvent if the freezing point constant is -1.86 C/m? Show all of the
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Which of the following types of fingerprints is collected with gray or black powder and fingerprint tape?
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A penny has a mass of 2.50g and the Moon has a mass of ×7.351022kg, How many moles of pennies have a mass equal to the mass of the moon?
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When the tank and its contents have cooled to 20.0 ∘c , what additional volume of ethanol can be put into the tank? express your answer using two significant figures?
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In a 0.27 m solution, a weak acid is 2.5% dissociated. (a) calculate the [h3o+], ph, [oh −], and poh of the solution.
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Why is white light the best for photosynthesis ? Why is blue light best for photosynthesis? Why is orange light best for photosynthesis? Why is green light the worst for photosynthesis?
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In a given diffusion apparatus, 15.0 mL of HBr gas diffused in 1.0 min. In the same apparatus and under the same conditions, 20.3 mL of an unknown gas diffused in 1.0 min. The unknown gas is a hydroca
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Mercury metal is poured into a graduated cylinder that holds exactly 22.5mL. The mercury used to fill the cylinder weighs 306.0g. From this information, calculate the density of mercury.
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Which of the following aqueous solutions will have the lowest vapor pressure at 25°C? 2.0 M CH4 1.0 M AlCl3 1.0 M NaCl 1.0 M BaCl2
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A runner wants to run 12 7km. She knows that her running pace is 8.0 mi /h. How many minutes must she run
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What experimental evidence leads scientists to believe that only quantized electronic energy states exist in atoms?
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1. In the models, what particles do the colored and plain sesame seeds represent? What particles do the poppy seeds represent? 2. What does the fiberfill represent in the models? 3. In an atomic model
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Which of the following would not be classified as a result of climate change? A. Extreme weather B. Expanding glaciers C. Rising sea levels D. Increased droughts
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Baking soda is sodium bicarbonate. it is 27.37 %by mass sodium what mass of sodium bicarbonate is needed to get 1619 mg of sodium
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Note: The following questions from Question 3 to Question 9 will not refer to the tomato powder but will instead focus on the compounds whose molecular formulas are known. Complete the following chart
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There are 12 inches (in.) in 1 foot (ft). Which expression can be used to find the number of inches in 2.5 feet?
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Calculate the density of one quart of oil weighing 2.755lbs. Units for density are g/ml. Useful CFs are: 1qt=0.9463 liters and 11lb=453.592g
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This unit discusses in detail the role of catalysts to lower the activation energy of reactions. The term catalyst appears in nonscientific discussions to refer to something that provokes or speeds si
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A 0.050g ball of aluminum foil absorbs 1.4s J heat when it is heated 31.6 C what is the specific heat of aluminum foil?
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Draw an arrow pushing mechanism for the formation of the acylium ion when acetic anhydride reacts with phosphoric acid.
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Scott scoops hot oatmeal into his bowl. He then notices that the outside of the bowl is very hot to touch. what type of heat energy transfer is this an example of?
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The price of a ream of paper is $4.00. There are 500 sheets of paper in a ream. If a sheet of paper weighs 0.500 gram. What is the price of 2.75 pounds of paper? (453.6 g = 1 pound)
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A solution is made by dissolving 15.5 grams of glucose (C6H12O6) in 245 grams of water. What is the freezing point depression of the solvent if the freezing point constant is -1.86 °C/m? Show all of
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What is the length(in cm) of the side of an iron ingot (rectangular box) that has a mass of 4.578 kg and has width = height = 5.00cm
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Calculate the heat capacity of a calorimeter if the combustion of 4.7 g of benzoic acid led to an increase in temperature of 7.2 °C.
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(3 pt) Which statement correctly identifies the revolution and rotation of the planets in the solar system? A. Planets rotate around the sun and revolve on an axis. B. The sun revolves around the plan
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What is the atomic number of the yet-undiscovered element directly below francium ( Fr) in the periodic table?
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What enabled Moseley to determine the number of electrons in atoms of particular elements? A. He measured the mass of a given volume of the element. B. He measured the temperature of the element in an
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The rights of workers to seek saftey and health on the job without feet of punishment is spelled out in:
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QUICKLY! 2C (s) + 2H2 (g) C2H4 (g) Which of the following best describes this reaction? A) The reaction will be spontaneous at any temperature. B) The reaction will not be spontaneous at any temperatu
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Which represents a balanced nuclear equation? a. 23/11 Na ----> 24/12 Mg +1/1 H b. 24/11 Na----> 24/12 Mg +1/-1 e c. 24/13 Al ---->24/12 Mg+0/-1 e d. 23/12 Mg---> 24/12 Mg +1/0 n
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If we reverse the reaction to read Z + Q → X + Y, the +ΔH would be a -ΔH. Does this indicate that heat is given off or absorbed in the reverse reaction?
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Aspirin (acetylsalicylic acid, c9h8o4) is a weak monoprotic acid. to determine its acid-dissociation constant, a student dissolved 2.00 g of aspirin in 0.600 l of water and measured the ph. what was t
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If you have 3.64 grams of agno3, how many molecules of cu do you need to fulfill the reaction 2agno3 + cu -> cu(no3)2 + 2ag
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Be sure to answer all parts. devise a synthesis of x from the given starting materials. you may use any inorganic or organic reagents. 16203a part 1 out of 3 draw the product of the diels-alder reacti
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Explain why ethyl acetate is insoluble in water, but soluble in hexane using specific IMFs. (intermolecular forces)
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