Chemistry

A tree is an example of an object that contains chemical energyTrue or false please help
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Which statement about Niels Bohr's atomic model is true?O Higher orbits have lower energies.Each orbit has a specific energy level.Electrons can exist in any energy level.O Orbits close to the nucleus have no energy.Hurry.
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A chemist needs to know the mass of a sample of to significant digits. He puts the sample on a digital scale. This is what the scale shows: 0 0 0 7 6 . 3 gIf this measurement is precise enough for the chemist, round it to significant digits.Otherwise, press the "No solution" button.
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A group of students is setting up a test to see whether earthworms, like those shown in the photo, prefer rough or smooth surfaces
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The concentration of a benzene solution prepared by mixing 12.0 gC6H6 with 38.0 g CCl4 is __________ molal
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What % of original U238 remains after three half lives? 1-502-253-12.54-6.25
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true or false plz help
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Which of the following statements about fats is FALSE?They are insoluble, making them good for long-term energy storage within the body.They are used to make cell membranes.They dissolve easily in the bodys fluids.They can affect blood pressure, inflammation and the immune system.
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An aqueous solution contains32.7% KCI (weight weight %)How many grams of KCl arecontained in 100 g of this solutionMolar MassKCE: 74.55 g/molH20 18.016 g/mol
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3 Zn + 2 MnF3 ---------> 2 Mn + 3 ZnF2Using the reaction above, calculate how many grams of manganese (Mn) are produced in this reaction when 8.5 moles of Zinc (Zn) are used as a reactant?
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What is the product of the equation shown? 2 Na + S203 A. Na S203 B. NaS40 C. Na2S205D. Na2S2O3
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A cook prepares a solution for boiling by adding 12.5 g of NaCl to a pot holding 0.750 L of water. At what temperature should the solution in the pot boil? {Normal boiling point is 100oC and Kb = 0.512 oC kg/mol and density of water is 1 kg/L} Thanks!!
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Fish can be killed by a sudden increase in water A. TemperatureB. Level C. DensityD. Color
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Glucose is produced through the process of photosynthesisand is shown below. How many atoms of hydrogen arepresent in one molecule of glucose?631224
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10 points for 5 questions plz help I need this done in the next 30 mins or like ASAP pleeeeeesssssssssssssssssssssssssssssssssss i also am puting more out tooooooo
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Does anyone know how to do this?
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calculate the molarity of the solution in a flask that contains 2.50 moles of potassium sulfate in 125 mL of solution
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Substances, such as litmus paper or red cabbage juice, that turn color based on the pH of the solution are called ___. solutessolutionsindicatorssolvents
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Which one of the following represents an acceptable set of quantum numbers for an electron in an atom? (arranged as n, l, ml, and ms)2, 2, -1, -1/23, 3, 3, 1/23, 3, 3, -1/25, 4,- 5, 1/22, 1, 0, 1/2
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What type of reaction is displayed below?HCI + NAOH NaCl + H20
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in which group in the periodic table do we not find metal A.Group 1 B.Group 2 C.Group 3 D.Group 5
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Which terms correctly identify the indicated structures in this sketch of a cell viewed under a microscope? Match each label to the correct cell part. Question 5 options: Golgi Apparatus Nucleus Endoplasmic Reticulum Mitochodrion Ribosome Lysosome 1. 2. 3. 4. 5. 6.
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15POINTS I NEED HELP WITH THIS QUESTION PLEASE!
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How many moles are there 75.56 grams of KHCO3
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