Chemistry

2. XC12 is the chloride of metal X. The formulae of its sulphate is
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A substance is made up of slow-moving particles that have very little space between them. Based on this information, what can most likely be concluded about this substance? O It is not a gas because its particles do not move continuously. It is a gas because its particles move continuously in a straight line. 0 It is not a gas because its particles do not have large spaces between them. It is a gas because its particles move in many different directions.
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While driving her car on a hot sunny day, a woman was struck in the back of the neck by the dough from an exploding can of Pillsbury biscuits. From the sound it made and the feeling of warm sticky dough on her neck, she thought she had been hit by a bullet! Describe the likely conditions that caused this to happen. Be sure to explain AT THE MICRO scale how the particles were affected.
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The fact that a beam of particles was deflected in the presence of an electricor magnetic force led J.J. Thomson to conclude that the particles had a(n)O A. large massB. electric chargeO C. negligible massO D. neutral charge
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During electrophilic aromatic substitution, a resonance-stabilized cation intermediate is formed. Groups, already present on the benzene ring, that direct ortho/para further stabilize this intermediate by participating in the resonance delocalization of the positive charge. Assume that the following group is present on a benzene ring at position 1 and that you are brominating the ring at positon 4. Draw the structure of the resonance contributor that shows this group actively participating in the charge delocalization.-----OCH3
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4.1 shows a plant cell. g For Examiner's Use n. C D Fig. 4.1 (i) Name the type of plant cell shown in Fig. 4.1. [1]
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Consider the reaction: A(aq) + 2B (aq) === C (aq). Initially 1.00 mol A and 1.80 mol Bwere placed in a 5.00-liter container. The mole of B at equilibrium was determined tobe 1.00 mol. Calculate K value.0.0605.12517Ugh
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The standard entropy change of a reaction has a positive value. This reaction results in: Select the correct answer below: a decrease in entropy. an increase in entropy. no entropy change. neither an entropy increase nor decrease.
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In practice, the second law of thermodynamics means that: a. Systems move from ordered behavior to more random behavior. b. Systems move from random behavior to more ordered behavior. c. Systems move between ordered and random behavior patterns based on temperature. d. Systems are constantly striving to reach equilibrium.
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Consider a hypothetical metal that has a density of 10.6 g/cm3, an atomic weight of 176.8 g/mol, and an atomic radius of 0.130 nm. Compute the atomic packing factor if the unit cell has tetragonal symmetry, values for the a and c lattice parameters are 0.570 and 0.341, respectively.
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During the reaction of 2-methyl-2-butanol with the nucleophile-solvent mixture two layers are formed after shaking the reaction for 5 minutes. After removing the aqueous layer with a Pasteur pipette the organic layer is diluted with 1 mL dichloromethane. The organic phase is washed with 1 mL water. Two layers are obtained.a. Top layer is Aqueous (H20/ H2SO4/NH4CI) b. Top layer is Organic (CH2Cl2 and product) c. Bottom layer is Organic (CH2Cl and product) d. Top layer is Aqueous (H20)
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8 - Escriba la frmula del siguiente compuesto nitrogenadoDietil benza amida
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Blood test can be used to check a person's blood glucose and hormone levels. The tabular column given below shows the result of two blood tests carried out on three people to check their blood glucose levels. Person 1 is healthy. A:- Compare the glucose levels of person 1 with the glucose levels of person 2 after fasting for 12 hours. B:- Compare the glucose levels of person 3 with the glucose levels of person 1, 2 hours after drinking 75g glucose. C:- Person 3 cannot be produce the hormone that control blood glucose levels. State the hormone that person 3 cannot produce. ( THE ORDER OF THE PHOTO IS:- person 1, and person 2, and person 3)Pls it is urgent
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A solution is prepared by dissolving 6.60 g of an nonelectrolyte in water to make 550 mL of solution. The osmotic pressure of the solution is 1.84 atm at 25 C. The molecular weight of the nonelectrolyte is ________ g/mol.
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how is the molecule of substance formed
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How many Sodium (NA) Atoms are in Calcium Oxide
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What is the correct ratio of carbon to hydrogen to oxygen in glucose (CH1206)?12:12:62:1:11:2:16:6:12
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Each element has a different:number of protons and electronsatomic mass and weightProperties and characteristicsnumber of neutronsPlease take your time if needed!
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2. Low-density polyethylene, used to make plastic films, ismade by the radical polymerization of ethene, and is one ofthe hardest plastics to recycle. It gets its nameA. from the process by which it's polymerized.B. because of the way the chains pack like spaghetti, closeand tight.C. from the spaces left between chains when the polymer isformed.D. because it's strong but flexible.
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9. a) Name salt that can be prepared by precipitation
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You need to make an aqueous solution of 0.182 M aluminum sulfate for an experiment in lab, using a 250 mL volumetric flask. How much solid aluminum sulfate should you add
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9.0 mol of pure ammonia gas was injected into a 3.0 L flask and allowed to reach equilibrium according to the equation 2 NH3(g) = N2(g) + 3 H2(g). The equilibrium mixture was analyzed and found to contain 3.0 mol of hydrogen gas. Calculate the value of the equilibrium constant.
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If a buffer is composed of 23.34 mL of 0.147 M acetic acid and 33.66 mL of 0.185 M sodium acetate, how many mL of 0.100 M NaOH can be added before the buffer capacity is reached
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Consider the reaction below. How much heat is absorbed if 5.00 moles of nitrogen reactwith excess oxygen?2 N2 (8) + O2(g) 2 N20 (8) AHrxn- +163.2 kJ
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