How many grams of the 90% pure gold must a smith use with a 65% pure gold alloy to make 5000 grams of an alloy which will be 70% gold?

Q: What is the volume of 25.5 g of water in m3 ? Use the density of the water, 0.997 07g/mL. Note that…

A: Given: Mass of water = 25.5 g  Density of water = 0.997g/mL 1 mL = 1 cm31 cm = 10– 2 m Hence, 1 cm3…

Q: -5 At -6.33 °C the concentration equilibrium constant K = 1.2 × 105 for a certain reaction. Here are…

A: Answer: Given data: K1=1.2×10-5∆H=126kJ/molT1=-6.33°CT2=-26°C

Q: The vapor pressure of Substance X is measured at several temperatures: temperature vapor pressure…

A: Enthalpy is the energy released or absorbed during a reaction. Vaporization is a process in which a…

Q: Situation 3: Using perfect gas law. Note: Gas constant, R=8312/molecular weight, molecular weight of…

A: Answer: Below shown ideal gas equation will be used to solve these problems: P=dMRT Here: P=pressure…

Q: Draw the Line Bond Structure for bromine gas (Br₂)

A: we have to complete the given steps to draw structure of Br2

Q: Methane (CHA) burns in oxygen via the following reaction: CHa(g) + 202(8) > CO2(8) + 2H20(g) ; AH=…

A: The amount of energy absorbed or released in a chemical reaction is known as enthalpy of the…

Q: What is the chemical formula for the compound formed between cobalt(III) and the nitrate ion?…

A: We need to find the chemical formula for the ionic compound formed by given ions.

Q: Question The determination of Calcium in a 100 ml of natural water was done by precipitating the…

A: From the mass of CaO we can correlate it to concentration of concentration of calcium in water.

Q: 4. In case of an process, the temperature of the system increases b. adiabatic compression c.…

A: An adiabatic process is defined as the process in which no heat transfer takes place.

Q: Q16: Consider the following diagram that represents Gibbs energy changes (in kJ/mol) as the…

A: Since, you have posted a question with multiple sub-parts , we will solve first three sub - parts…

Q: Answer TWO branches (aq) +Fe(s) → Cu(qa) + Fe2+ Cu2+ A/ By calculation E and AG for the reaction…

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Q: Provide the correct IUPAC name for the compound shown here. H3C.

A: Answer: Full form of IUPAC is International Union of Pure and Applied Chemistry. It provides us the…

Q: The osmotic pressure (in atm) of 0.499 M K2SO4 solution at 298 K is ______? Give your answer to…

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Q: Read each description in the first column of the table below. If any chemical element with atomic…

A: Given table is :  Complete the table :  In periodic table, there are 7 periods and 18 groups.

Q: a solution is prepared by dissolving 49.3 g of KBr in enough water to form 473 mL of solution.…

A:

Q: choose the aqueous solution that has the highest boiling point. these are all solutions of…

A: The elevation in boiling point of the solution is given by: ∆Tb=iKbm ......(1) Here, i is van't Hoff…

Q: what mass of solution (in grams) containing 6.50% Na2SO4 by mass contains 1.50g of Na2SO4?

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Q: Predict products of the McLafferty rearrangement for the molecule . Provide high quality drawings…

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Q: How does decreasing the total energy of the system affect the stability of the pair of atoms in the…

A: As we know,  higher is the energy, less is the stability of bond.

Q: The work function of metal D, OD, was determined using the photoelectric effect and 220. nm light.…

A: Given, Applied radiation of wavelength - 220 nm Velocity of electrons ejected - 8.34 × 105 m/s Mass…

Q: (Cr, at.wt. = 52.0), and 9.52 grams of oxygen (O, at.wt. = 16.0). The empirical formula of this…

A: According to guidelines we are supposed to answer only one question. If you want rest of the…

Q: red 3. A student performs a separation by TLC on a silica get plate that results in three spots. A…

A: Introduction:  Thin-layer chromatography (TLC) is an important technique for the identification and…

Q: Ammonia is produced from the reaction of nitrogen and hydrogen according to the following balanced…

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Q: 1. How many protons (P), neutrons (N) and electrons (e) are present in 22286Rn+²: a. 222 p 136 n 86…

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Q: Two moles of thiosulfate reacts with one mole of triiodide according to the equation (Note:…

A: Here we are required to determine the rate of consumption of triiodide

Q: The freezing point of 58.53 g of a pure solvent is measured to be 44.17 ºC. When 2.15 g of an…

A: We are given with a data for the depression in freezing point on adding a solute to a pure solvent…

Q: The nonvolatile, nonelectrolyte DDT, C14HgCls (354.5 g/mol), is soluble in diethyl ether,…

A:

Q: -You nged Consider a cell with following ionic compor Inside: [Na+] = 5 mM [K]= 135 MM [C- 1-5-M [cl

A: Eion =2.303 RTZF log ([Co][Ci]) where Eion is the reversal potential, R is the gas constant, T is…

Q: 90 Strontium-90, a radioactive isotope, is a major prod- ct of an atomic bomb explosion. It has a…

A: Given Half life = 28.1yr.

Q: Prelaboratory Questions Name Laboratory Section 1. Read the Introduction and Procedure for this…

A: The principle of TLC is  adsorption at stationary phase--> desorption af --> dissolve-->…

Q: Consider the following mechanism for the enzyme- catalyzed reaction: E + SES ES 2 E + P (fast…

A: Given, E + S ⇄k-1k1 ES         {fast equilibrium }ES→k2 E+P            {slow}

Q: Macmillan Learning Consider a general reaction A(aq) B(aq) The AG" of the reaction is -7.140 kJ.…

A:

Q: 02 Announcements - CHM2 ← → C K app.101edu.co D Starting from the Newman projection below, rotate…

A: The staggard conformation in which bulkier groups at dihedral angle of 60° and 300° .This is called…

Q: (2). For the buffer system in Problem no. 1, what will be the pH when (a) 15.0 ml of 0.500 M HCI and…

A:

Q: 10. Draw the complete, detailed mechanism of the formation of the ozonide for the following…

A: When alkene compound is treated with ozone gas in presence of DMS then ozonolysis reaction takes…

Q: 3. Another method of making the spots of these cations visible is by spraying the chromatogram with…

A: Ions are of two types: cation and anion. Cations are positively charged and anions are negatively…

Q: (a) (b) (c) OH Br NH Br HCI - 20°C Br₂ FeBr3 HNO3 H₂SO4

A: Alkene reaction with HCl to give addition product. Phenols reacts with Bromine in the presence of…

Q: 47Ca is radioactive and is used medically to detect bone tumors and other bone abnormalities. Its…

A: Intergrade rate law equation for first order nuclear reaction is  ln [Nt]/[N0]  = -kt [N0] = 100%…

Q: 12. The complete combustion of acetylene (C₂H2) is described by the following reaction: C,Hz + Oz →…

A: Q.12 The given equation of combustion of acetylene is: C2H2+O2→CO2+H2O

Q: 6. On what electrode and What mass (in gram) of chlorine gas could be released from a solution of…

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Q: 1. Give the hybridization of the indicated atoms in each of the following molecules a)…

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Q: physical chemistry, please solve question 2

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Q: The freezing point of 48.06 g of a pure solvent is measured to be 45.44 ºC. When 2.04 g of an…

A:

Q: Write the IUPAC name for the compound below. Be sure to use correct punctuation. Keep the…

A:

Q: 2. (a) How many moles of Mg ions are present in 5.83x10 m of a 8.95×10 M solution of MCH,CO₂) Report…

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Q: A tank contains H₂ at 7 atm and 32°C. When 1.5 kg of the gas is removed, the pressure goes down to 6…

A: Answer: This question is based on ideal gas equation which is shown below: PV=nRT Here: P=pressure…

Q: 1. How many phases are present at each of the points a-d indicated in the phase diagram (for a pure…

A: Phase diagram of one component system is a  two-dimensional plot, showing the phase changes as…

Q: Q9: What is the approximate equilibrium constant at 25°C for the reaction 2 Cut → Cu²+ + Cu? Given:…

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Q: 3 Betes carbon 6) СН3-СН2 0 H₂ { c ² {{ ↑ alpha CEO: 10:45p² +C- CH₂CH/3 - Cerbon CH₂ CH3 국내 CH2-CH3…

A: Neutral structure is more stable and structure having more number of covalent Bond .

Q: The average adult female should consume 2000 Cal per day. If you've consumed 35% of your daily…

A:

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".