Chemistry

the mineral manganosite, manganese (ii) oxide, crystallizes in the sodium chloride like structure, with a density of 5.365 g /cm3. find the unit cell edge length of manganosite.
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1.) You have a sample of 1.64 moles of aluminum carbonate is mixed with lithium to produce lithium carbonate and aluminum. How many moles of lithium would completely react with all the aluminum carbonate. 2.) a synthesis reaction between magnesium and nitrogen forms an ionic compound magnesium nitride. If you have 4.226 moles of magnesium how many grams of nitrogen will completely react with the magnesium. 3.) given the following equation 8Fe+S8>8FeS, how many grams FeS are produced, and what mass of iron is needed to react with 16 grams of sulfur 4.) B2H6+3O2>HBO2+2H2O, what mass of O2 will be needed to burn 31.6g B2H6, and how many miles of water are produced from 12.8g B2H6
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Write the chemical reactions for the formation of the respective Grignard reagents from the reaction of magnesium with the following organic halides: iodomethane, bromobenzene, chlorocyclohexane
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a linear a tetrahedrala bent a square planara trigonal planar an octahedral a seesaw a trigonal bipyramidal In structure (a), four pairs of electrons give ___ electron geometry. The lone pair would a trigonal pyramidal cause lone pair-bonded pair repulsions and would have __ molecular geometry. In structure (b), five pairs of electrons give ___electron geometry. The lone pair occupies an equatorial position to minimize lone pair-bonded pair repulsions, and the molecule would have ___ molecular geometry. In structure (c), six pairs of electrons give __ electron geometry. The two lone pairs would occupy opposite positions to minimize lone pair-lone pair repulsions, and the molecule would have ___ molecular geometry.
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graphite and diamond have the same chemical compositions and different crystalline structures. group of answer choices true false
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How many mL of 2.25M H2SO4 are needed to react completely with 69.9g BaO2
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if 7.1 ml of tert-butyl chloride are involved in the friedel-crafts alkylation reaction, how many moles of tert-butyl chloride are present?
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suppose the 1h nmr spectrum shown below is obtained from a reaction product of a student who wanted to make acetyl ferrocene from ferrocene, what can you say about the product?
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5. What measures how stressful exercise is on your body?O A. FrequencyO B. DurationO C. VolumeD. Intensity
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What does conserving mass mean in a chemical equation? Responses There is equal number of each type of atom on the reactant and product side. There is equal number of each type of atom on the reactant and product side. There are more of each type of atom on the product side than on the reactant side. There are more of each type of atom on the reactant side than on the product side. There is an unequal number of each type of atom on both sides of the equation.
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ka toa 0.109 m solution of a weak acid (ha) has a ph of 4.50. what is the pka of the acid? enter pka to 4 decimal places. pka
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which type of bond is responsible for holding two water molecules together, creating the properties of water? multiple choice covalent hydrogen double covalent ionic polar
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14)Hydrogen Emission SpectrumThe diagram below represents the emission spectrum of hydrogen in the visible range. The line on the left represents theemission with the smallest wavelength.Which of the following is the best explanation pertaining to the distribution of visible light in hydrogen's emission spectrum?
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which of the following is a type of physical weathering? group of answer choices thermal expansion dissolution oxidation hydration
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Scientists often review the results of other scientists' work. Which of the following is a good reason for this review? I. A scientist can receive credit for another scientist's work simply by reviewing it. II. Reviewing scientific results help to ensure that the results are accurate. III. Reviewing scientific results helps to ensure that scientists are objective when they perform experiments. IV. Sometimes additional important questions can be raised when a scientist's work is reviewed. A. I, III, and IV only B. II and IV only C. II, III, and IV only D. I, II, and III only
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how much 2.25 m h3po4, in ml, would you need to add to 50.00 ml of 3.50 m ca(oh)2 in order to neutralize the solution? ml of h3po4
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A 1.000 g sample of decane, C10H22, is ignited in a bomb calorimeter. The temperature of the calorimeter increases from 20.0 to 78.8 C. If the heat capacity of the calorimeter is 810.1 J/ C, determine delta E for the combustion of decane.This is the question, and I solved the q (decane) but don't know how to solve the delta E
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write a balanced chemical equation for the reaction of aqueous solutions of magnesium chloride and potassium phosphate
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The equilibrium constant for a reaction is greater than 1.0 at temperatures above 500 K but less than 1.0 attemperatures below 500 K. What can be concluded about the values of AH and AS for the reaction? (Assumethat AH and AS are independent of temperature.)(A) AH> 0 and AS > 0(B) AH> 0 and AS < 0(C) AH < 0 and AS > 0(D) AH
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molecules that are composed of carbon and hydrogen atoms and provide energy for life processes are called
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What is one way that the layers of the atmosphere help to maintain life on Earth?
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which common intermediate is formed during the synthesis of imines and enamines, when carbonyl compounds react with primary and secondary amines?
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a 3.742 g sample of a compound containing only carbon and hydrogen wasanalyzed by combustion and found to contain 3.140 g of carbon and 0.602 gof hydrogen. mass spectral analysis indicates that the molar mass for thiscompound is 100.2. what is the molecular formula for this compound?
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The process by which hot and cold air are transferred in the atmosphere isA radiation. B insulation. C convection. D conduction.
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