Chemistry

In which pair do both compounds exhibit predominantly ionic bonding? A) KCl and CO2 B) SO2 and BaF2 C) F2 and N2O D) N2O3 and Rb2O E) NaF and SrO
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How many moles of gold are equivalent to 1.204 1024 atoms? 0.2 0.5 2 5
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what js the percent yield of lithium hydroxide from a reaction of 7.40 g of lithium with 10.2 g of water? the actual yield was measured to be12.1 g
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11. The mass (in grams) of FeSO4.7H2O required for preparation of 125 mL of 0.90 Msolution is:(a) 16 g(b) 25 g(c) 13 g(d) 31 g(e) 43 g
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Describe how you would prepare 500ml of 40% (w/v) aqueous iodine solution.[Atomic mass of iodine =127g/mol].
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Shalom, Guys! The molar mass of strontium (\ce{Sr}SrS, r) is \pu{87.62 g/mol}87.62 g/mol87, point, 62, space, g, slash, m, o, l. Calculate the number of atoms in a \pu{67.5 mg}67.5 mg67, point, 5, space, m, g sample of \ce{Sr}SrS, r. Write your answer in scientific notation using three significant figures. \text{atoms Sr} ______________ atoms Sr Love, Piper Rockelle
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Explain why chlorine is a gas while iodine is a solid yet both are halogens. Select one: a. Both iodine and chlorine differ in strength of metallic bonds b. Chlorine has strong inter molecular forces than iodine c. Iodine molecules are large with strong inter molecular forces than chlorine
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During which phase do the centromeres split, allowing the two linked chromatids to separate?
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If you have 2.4L of SO2 gas (at STP) how many moles of sulfur dioxide do you have?
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Emission of which one of the following leaves both atomic number and mass number unchanged? (a) positron (b) neutron (c) alpha particle (d) gamma radiation (e) beta particle
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Which scientist developed a new model of planetary motion?
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5 (01.01 LC)Which of the following would be a warning sign that information about a weight loss medication is not reliable science?
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1. What are some of the steps to the scientific method?
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Please help, Which type of molecule is shown below?
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Complete the sentences describing the cell. a. In the nickel-aluminum galvanic cell, the cathode is ____ .b. Therefore electrons flow from___ to ____.c. The ____ electrode loses mass, while the ____ electrode gains mass.
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Which statement best describes a compound formed by an ionic bond?A) negatively chargedB) neutralC) contains multiple chargesD) positively charged
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Consider this synthesis of isoamyl acetate based on this week's experimental methods, after refluxing the reaction mixture for 25 minutes, what is likely present in solution
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Which criteria are responsible for deciding whether a heterogeneous mixture is a colloid or a suspension?A. whether its composition is uniform and transparentB. whether the particles remain suspended for an extended period of timeC. whether it can be separated into simpler substances through physical separation techniquesD. whether the ratio of components is fixed
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You are pushing a box with 20 N of force that hasa mass of 10 kg, solve for acceleration
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what errors can lead to pseudocience?
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Consider the hypothetical chemical reaction represented by the equation 3 A + 2 B A 3B 2 Which of the following is a correct interpretation of this equation? i. 3 grams of A react with 2 grams of B to form 1 gram of A 3B 2 ii. 3 atoms of A react with 2 atoms of B to form 1 molecule of A 3B 2 iii. 3 moles of A react with 2 moles of B to form 1 mole of A 3B 2
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The electron in a hydrogen atom can undergo a transition from n = 4 to n = 3, emitting a photon with energy 1.06 10 19J. Use this transition to answer the following questions.i. What is the wavelength of this transition?ii. How does this transition show that the position of the electron is quantized?
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Which of the following compounds is more soluble in a 0.10 M NaCN solution than in pure neutral water? Ca3(PO4)2 AgBr CaCO3 Mg(OH)2 NH4ClO4
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How many lead (Pb) atoms will be generated when 5.38 moles of ammonia react according to the following equation: 3PbO+2NH33Pb+N2+3H2O? A) 1.62 10^24 B) 4.86 10^23 C) 2.43 10^24 D) 4.86 10^24
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