Which of the following substances should have the highest melting point? Group of answer choices CF4 MgO I2 Xe NH3

Q: The Ksp for an ionic solid, AB2, is 2.821*108. The molar mass of this ionic solid is 99.59 g/mol.…

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Q: How many grams of ammonia are ſormed if 236 g of nitrogen oxide reacts with 42.9g of hydrogen gas?…

A: Mass of nitrogen oxide = 236 g Mass of Hydrogen gas =42.9 g Actual yield of ammomia = 104.1 g

Q: An analytical chemest is titrating 150.6 ml. of a 0.6600 M solution of dhethylamine (C,H,), NH) with…

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Q: question. A helium-filled weather balloon has a volume of 861 L at 19.9°C and 751 mmHg. It is…

A: According to ideal gas equation,  (P1V1 ) /T1 = (P2V2)/T2

Q: What is the half-life of thallium-210 if 2.40 minutes are required for the activity of a sample of…

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Q: c) 4 HCI(g) + O2(g) D2 2 CI,(g) + 2 H,0(g) (6)*0

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Q: A reaction has a standard enthalpy change, AH, of +10.00 kJ/mol at 298 K. The standard entropy…

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Q: 31.7 grams of CaCO3 were dissolved in enough water to give 900.1 grams of solution. Calculate the…

A: Given :-  Mass of CaCO3 = 31.7 g  Mass of solution = 900.1 g  To calculate :-  Percent by mass of…

Q: What is the proper order of setting up a pendant drop apparatus using the following? Thank you :)

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Q: A general reaction written as 2A + 2B  → C + 2D is studied and yields the following data.…

A: General representation of reaction rate is :-  Rate = K[A]n[B]m  Where k = rate constant  n and m…

Q: urce Dose (mremlyear) turally Occurring Radiation emic rays rrestrial radiation (rocks, buildings)…

A: Ans. In an accident, the radiation exposure = 4.23×10-4 Sv   Exposure from terrestrial radiation…

Q: The normal boiling point of ethanol, C2H5OH, is 78.3 °C and its molar heat of vaporization is 39.3…

A: Given: T1 = (52.1+ 273.15) K = 325.25 K P1 = ? T2 = (78.3 + 273.15) K = 351.45 K P2 =760 mmHg ΔHvap…

Q: chatelier's principle S₈(g) + 120₂(g) ↔ 8 SO₃(g) + 808kcals what will happen when... (A) Sulfur…

A: Given- S8(g)+12O2(g)<->8SO3(g)+808 kcals

Q: 5. Classify each of the following as strong electrolyte (SE), weak electrolyte (WE), or nonelectro…

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Q: Write a balanced nuclear equation for the following: The nuclide carbon-14 undergoes beta emission.

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Q: What mass is grams of potassium chloride is produced if 2.4 moles of potassium chlorate decompose…

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Q: A reaction occurs according to the following balanced chemical equation: AaBbs + 5 Cc → Áa + 5 BbCc.…

A: Answer: Limiting reagent is the substance that exhausted first in the reaction and decide the yield…

Q: Draw a reaction scheme for the reduction of benzil to hydrobenzoin. Draw the complete mechanism for…

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Q: The transmutation reaction 28Si + 4He > X Xforms what isotope? 14 O 28SI 14 O 32S 16 O 24M8 12 O 14N

A: Correct option is (B)

Q: For the reactions below, predict the major product. Hint: Consider whether the Lewis Base has formal…

A: Both the reaction are example of substitution reaction where one functional group is substituted by…

Q: a) HO 2. Br 1. NaH b) OH HBr c) HO- H2SO4 NaCN CI CI 1)

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Q: When 15.0 mL of a 8.48×10-4 M copper(II) bromide solution is combined with 22.0 mL of a 9.19×10-4 M…

A: Answer: Precipitate only forms when ionic product of the compound becomes great than its solubility…

Q: a. You have 1.893x10²º molecules of chromium (III) phosphate. i There are ii. There are ii. There…

A: Given: Molecules of chromium (III) phosphate = 1.893×1029 molecules Known: Molar mass of CrPO4 =…

Q: Use the data in the table above to calculate an approximate AH° in kilojoules for the synthesis of…

A: Given- 2NH3(g)+Cl2(g) -> N2H4(g) +2HCl(g) ∆H°rxn=?

Q: 4) Vitamin B3, also known as niacin, helps maintain the normal function of the skin, nerves, and…

A: Vitamin B3 also known as niacine.Of formula C6H5NO2.Tablets contains vitamin B3 or C6H6N2O.…

Q: Part A Assume that the kinetic energy of a 1150 kg car moving at 135 km/h could be converted…

A: First we would calculate kinetic energy of car , which would be value of heat.  Then we would use…

Q: 1600 1500 1400 1300 1200 F1100 F1000 900 800 700 600 -500 400 300 200 F100 -100 13 12 11 10 f1 (ppm)…

A: As we see, the total number of protons in the NMR spectra shown = 24 Hence, the variation is only on…

Q: In a ammonia gas formation and equilibrium. What would most likely happen if a scientist decreased…

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Q: True or false: the zero-point vibrational energy should be subtracted from the electronic energy to…

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Q: What is the major organic product of the following reaction. NH HN B.

A: Amine group  acts as nucleophile because it has loan pair in nitrogen atom. Hence, it give addition…

Q: CALCULATE THE Concentration iron(III) thiocyanate ion [FeSCN2+] (M )

A: Insufficient information but I know the all data so I tried to solve it. If you have different data…

Q: Re-order each list in the table below, if necessary, so that the atoms or ions in it are listed in…

A: Given ; atoms and ions

Q: What is the multiplicity of the CH3 radical? Select one: а. O b. 1 О с. 2 d. 3

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Q: by HSAB rule the reaction will lies to right or lift ?? 1) Cas + H20 .- Cao + H2S 2) All3 + 3NAF -…

A: We would use HSAB rule , according to which Hard acid prefer to bind with hard base . Soft acid…

Q: What amount of moles of PCI3 form given 275 g Cl2 ? 6Cl, → 4PCI, P +

A: ★ Answer : 2.59 moles of PCl3 will be formed. ★ Solution :

Q: What percentage of a radioactive substance remains after 5.00 half-lives have elapsed? O 12.5% O 50%…

A: Number of half life = 5 half life

Q: Name the following carboxylic acid or ester. CH3-CH2-CH2 C-0– CH3

A: 1. Select the principle carbon chain 2. Numbering 3. Naming (prefix + word root + suffix)

Q: What is the binding energy in kJ/mol nucleons for antimony-123? kJ/mol nucleons 51 H+ 72;n→ Sb The…

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Q: What is your element? Neon  2. What is the molar mass of your element? 3. How many atoms are in a…

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Q: HW-1- Find the Destination Numbers of following Refrigerant chemical formulas No. Refrigerant…

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Q: Expressing amounts of energy in different energy units is necessary to solve many chemistry…

A: Given-> 1 calorie = 4.184 J 1 kcal =1000 cal

Q: Do the following structures represent the same molecule, isomers, or neither? [ Select] Why? [Select…

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Q: Potassium acid phthalate, KHC8H4O4 (molar mass = 204.22 g/mol), is used to standardize solutions of…

A: We have to predict the Molarity of the base solution.

Q: ume, where the addition of a esults in a large jump in pH. of the acid solution. added pH. 5.05 5.22…

A: Given,  Molarity of NaOH = 0.1025 M Volume of Acidic solution = 25.00 mL There is sudden jump at…

Q: How many grams of ammonium sulfate can be produced if 30.0 mol of H2SO4 react with excess NH3…

A: Number of moles is calculated by dividing the given mass with molecular mass.

Q: The pOH of a 0.025 M of HCIO4 is O a. 12.40 ОБ. 0.94 O c. 13.06 O d. 1.60

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Q: (a) A compound known to be a substituted cyclohexanone derivative has lamda max of 235 nm. Could…

A: a) It is said that the compound is a substituted cyclohexanone.   This means the compound is a…

Q: 2H2S(g) + O2(g) 2S(s) + 2H2O (g) and delta H is -221.19 kJ/mol. If the temperature in this…

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Q: A test that could be safely used to distinguish a strong base from a weak base. O a. Electrical…

A: Electrical conductivity is the measurement of amount of electricity flow through the material or…

Q: Net ionic C. LiBr(aq) + Pb(NO,):(aq) Complete ionic Net ionic d. K,SO4 (aq) + NaCl (aq) - Complete…

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Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.