7.127 Explain why it is more difficult to ionize a fluorine atom than a boron atom.

Q: [OH ] = 3.7×10-12 M Express your answer using two significant figures. H&O'] = Submit Request Answer

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Q: One equivalent of calcium ions = %3D O 2 equivalents of Cl- O all of the answers listed O 40 g O 20…

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Q: If the caffeine concentration in a particular brand of soda is 3.39 mg/oz, drinking how many cans of…

A: Find out the amount of caffeine in a can and compare this amount with the given mass of the…

Q: Construct the expression for Kc for the following reaction. 3 NO(g) = N₂O(g) + NO₂(g) 1 Drag the…

A: Given: equilibrium reaction

Q: Based on 1,3-Cyclopentadiene, using the necessary organic and inorganic chemicals The synthesis…

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Q: 1.08 ×10-3 mol H2S 57.2 mmol SO3 1.19 mol xenon dioxide  m(H2S) = m(SO3)= m(xenon dioxide)=

A: number of moles are given we have to calculate the mass of the given substances

Q: T / F Same mol’s of Ag and Au have same chemical particle counts. T / F Same counts of Ca and Mg…

A: Answer:- There are many formulas to calculate the moles of any element. mole = no. of particles…

Q: Where did you get 5.8166

A: See the quadratic equation,  4.8166 = x/(2.4-x) 4.8166 × (2.4-x) = x 4.8166 × 2.4 - 4.8166x = x…

Q: 9.0x10-2 M NaBrO. Express your answer using two significant figures. ΑΣφ [OH ] = %3D

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Q: A solution of ammonia and water contains 4 10x1025 water molecules and 5 90x1024 ammonia molecules…

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Q: How many significant figures should your answer have? 8.101 + 0.10 = O 1 O 2 O 3 O 4 O 5 O 6 O 8

A: In addition, significant figure of answer will be equal to less significant figure in all given…

Q: A sample of a 20.0 % KCI solution in water has a volume of 400 mL. What is the mass of KCI in this…

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Q: What are the products for the reaction of magnesium hydroxide with water? Mg2+ (aq) + 2 OH¯ (aq)…

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Q: Mg(s) + Sn²+ (aq) = Mg²+ (aq) + Sn (s) where [Mg²+] = = 0.050 M and [Sn²+] = 0.030 M. Round each of…

A: A question based on electrochemistry. An equation to represent cell reaction is given using that the…

Q: QUESTION 7 Solid Sodium Chloride is usualy separated out of a mixture by: O Dissolving it in water…

A: ANSWER : Option (a) Solid sodium chloride is usually separated out of a mixture by "Dissolving it in…

Q: 10 11 12 13 14 A chemist prepares a solution of potassium iodide (KI) by measuring out 3.0 x 10"…

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Q: Mass of Erlenmeyer Flask (g) 24.33 24.37 24.44 Mass of Erlenmeyer Flask + Calcium Hydroxide…

A: The comment should be: We’ll answer the first question since the exact one wasn’t specified. Please…

Q: 2:27 [CM] Using the graph below, determine the starting concentration of [CaH] at time = 0 seconds.…

A: Given: The equation of a straight line:  y = 0.061x + 100

Q: Ammonium phosphate ((NH4)₂PO4) is an important ingredient in many fertilizers. It can be made by…

A: Answer:- This question is answered by using the simple concept of stoichiometry which involves the…

Q: 1. How many grams of Na* are present in 2.53 grams of sodium iodide? grams Na+. 2. How many grams of…

A: NaI ---> Na+  + I- Thus 1 mol of NaI contains 1 mol of Na+ Then 190 g of NaI has 23 g of Na+

Q: A hospital saline solution is analyzed to confirm its concentration. A 50.0 mL sample with a mass of…

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Q: Question 11: You are a gemstone expert studying samples of various materials. Gemstone Hambergite…

A: From the given gemstones, the most massive gemstone is = Smoky Quartz (density = 2.65 g/mL) The…

Q: how many grams of nitrogen would be formed if 12.3g of ammonia was passed over 45.6g of copper(II)…

A: From the given equation and given data we have to estimate the amount of nitrogen .

Q: How many milliliters of 11.0 M HCl(aq) are needed to prepare 595.0 mL of 1.00 M HCl(aq)? V = mL

A: To prepare a 1.00 M HCl solution, we need to dilute a more concentrated 11.0 M HCl solution. We can…

Q: if [H₂] eq = 2.0 M, [NH3] eq = 0.5 M, and K = 2. N₂(g) + 3 H₂(g) = 2 NH3(g)

A: Here we are required to find the equilibrium concentration of nitrogen for the given reaction.

Q: 7. You have a 100 µM stock solution of dNTPs in the freezer and are setting up a PCR reaction in…

A: The answer for this problem is provided below in great details within the attached figure.

Q: NażSO4(aq) + Mg(OAc)2(aq) 2NaOAc + MGSO4 Complete ionic: 2Na^+ (Aq) + SO4^-(aq) +Mg^2+ (aq) + 20A¢^-…

A: We can classify reactions as : Single replacement reaction  Double displacement reaction Combustion…

Q: Question 2: standard notation with 3 decimals like this: X.XXX triprotic acid, H3A has the following…

A: Given Ka1 = 4.45 ×10-4 ; Ka2 = 7.86×10-8 and Ka3 = 8.81×10-15

Q: A solution has a concentration of 0.22 M KBr and a volume of 0.020 L. It is then diluted to a…

A: We know the dilution equation for a solution is => M1V1 = M2V2 where, M1 is the concentrated…

Q: Water is analyzed in wine by the Karl Fisher method with the following reaction: 12 + SO2 + 2H₂O 2HI…

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Q: Could someone walk me through how to solve this particular kind of equation, please? 7.2% x V1 +…

A: 7.2% × V1 + 0.9% × V2 = 5% × 350mL

Q: If 21.1 grams of an aqueous solution of copper(II) fluoride, CUF2, contains 3.81 grams of copper(II)…

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Q: (-4.3x10^4 mol/kg)x?=?mol/g

A: In this type of question we will simply identify the relationship between the given two units.

Q: 10 HNO3 (aq) +2 (s) 2 HIO3 (aq) + 10 NO2 (g) + 4 H20 (1)

A: A substance that undergoes oxidation (loss of electrons) is said to be reducing agent whereas a…

Q: where does the 0.693 come from?

A: Radioactive decay follows first order kinetics .

Q: The active ingredient of Benadryl© Chesty Forte Cough Liquid is Guaiphenesin an expectorant drug…

A: It is based on  the concept of concentration Here  we are requires to find  the volume of  the cough…

Q: How many mL of liquid mercury with a density of 13.6g/mL must you dispense to have 1.56 x 10-3 mol

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Q: in step 1 in the last line (in the box), where did you get the 2.303

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Q: What do you get if you subtract 0.250 L of ethanol from 0.250 L of water at room temperature?

A: Mixture of 0.250 litre of ethanol and 0.250 litre of water comes to 0.500 litre.

Q: Calculate the value of AH for N2H4 (1) + 02 (g) + N2 2 NH3 (g) + 3 N20 (g) N20 (g) + 3 H2 (g) 2 NH3…

A: To determine the value of ∆H of the reaction Hess law. According to Hess law the enthalpy change of…

Q: 10.4 mL of ethanol is allowed to undergo combustion with an excess of gaseous oxygen to produce…

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Q: Gypsum (CaSO4 2H20) is added to soil to enhance plant growth. It dissolves according to the…

A: Given that:                   Ksp  of gypsum = 3.14 × 10-5             Volume = 5.0 L To find:…

Q: A Kjeldahl procedure was used to analyze 356 μL of a solution containing 48.36 mg protein/mL. The…

A: Given concentration=48.36 mg protein/mL Molarity of HCl = 0.0336 M Volume of HCl = 5 mL = 5 x 10-3L…

Q: Some chemical compounds are listed in the first column of the table below. Each compound is soluble…

A: type of compound  important species present when dissolved in water

Q: A local water retention pond was found to have elevated levels of mercury concentrated as 14 ng per…

A: Given : Concentration of mercury i.e Hg = 14 ng/L. And volume of water in bond = 1250 m3  Since 1 ng…

Q: Find the pH of the solution containing 0.04 M Na3PO4. (Ka1 = 7x10-3, Ka1 = 2.2x10-7, Ka3 =…

A: Given : concentration of Na3PO4 = 0.04 M Value of Ka1, Ka2 And Ka3 To find : Calculate the PH of the…

Q: The concentration of H* (or H3O*) from part A should be 1.02×10¬2 mol L-1. What is the pH of the…

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Q: A 7.00% (m/m) saltwater solution has a density of 1.171 g/mL. How many grams of salt are in 28.00 mL…

A: Given :-  % m/m of solution = 7.00%  Density of solution = 1.171 g/mL  Volume of solution = 28.00 mL…

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.