A balloon fi lled with helium gas, He(g), develops a leak. If it originally contained 0.20 mol of gas and had a volume of 3.5 L, how many moles of gas are remaining when the balloon has a volume of 2.5 L?

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Q: wish to prepare 500. mL of 0.100 M K2Cr2O7 solution from a 0.250 M solution. Assuming that volumes…

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Q: 7.3) A sample of metal block at 75.5 °C was placed in 250.0 g water with the temperature of 22.5 °C.…

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Q: At what temperature will 19.4 g of molecular oxygen, O2, exert a pressure of 1820 mm Hg in a 5.12 L…

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Q: A 50.0g sample of Ba(OH)2 xH₂O(s) contains 27.2g of Ba(OH)2. Calculate the value of x for this…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

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Q: Consider the following reaction schemes involving the reaction of an imine with an organolithium…

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Q: 12. Which of the following equations represents a spontaneous redox reaction? Zn²+ (aq) + Pb(s) →→→…

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Q: What mass of magnesium is required to react with 265.0 mL  of 0.75M HCl at 26 degrees Celsius and…

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Q: A)Which of the following changes to the equilibrium system represented above will increase the…

A: Given , Reaction : H2(g) +F2(g)⇌2HF(g)         ∆H >0

Q: -) Identify the following compound CH2C1 C1- -CH3 Br- H

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Q: Given the reaction 2CO2(g) 2CO(g) + O2(g), it is known that 0.25M of reactant is placed in a…

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Q: Nitrous acid is a weak acid and has a concentration of 0.65 mol/L. What is the pH of the solution…

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Q: 4. Propose a reasonable mechanism, using curved arrow notation, for the following reaction. Be sure…

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Q: Draw the sold/dashed wedge structures (sk 4-methylhexane. Label each structure with the proper R/S…

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Q: Temperature C 25 °C Write the Ksp expression here: Calculate the Ksp value here (Show work): Volume…

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Q: What mass of phosphorous pentafluoride has the same number of fluorine atoms as 27 grams of oxygen…

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Q: A compound is made up of 19.1% Co, 34.4% CI, and 46.6% O. A 2.0 L sample of this compound had a mass…

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Q: The conjugate base of propan-1-ol, CH3CH2OH, is shown belo :0: *1₂ H3C-C- -CH3 H TRUE, FALSE OR IT…

A: A congugate base is the chemical species which is left over when an acid looses its proton and the…

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Q: Which of the arrows points to an atom that is 30 (tertiary) and sp³ hybridized? с d a mamana www

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Q: How many millilitres of concentrated sulphuric acid, 99.0%, density 1.831 g/cm3, are required to…

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Q: 1. Knowing the CaCOCa) + CO., which statement is true? a. adding a substance containing a common ion…

A: 1. Option D is correct answer as the formula for Ksp = [Ca2+] × [C2O42-] ,it means that reactant…

Q: Calculate the percent composition of hydrogen in NH4NO2.

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Q: ▼ ▼ Part A In order understand how this equation derived and why it holds true, the product f each…

A: Part A) Given, Concentration of the solution (M1) = 0.687 M = 0.687 mol/L Volume of the solution…

Q: Q9. Which of the following lithography printing causes almost no damage to the mask used during the…

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Q: In Part I of the experiment, you will prepare 5 solutions according to the chart below. Notice that…

A: [FeSCN2+] can be calculated using dilution formula and it is assumed that [FeSCN2+] = [SCN-]

Q: Determine the types (Type I, Type II, or Type III) AND the names of the following binary compounds:…

A: A question based on introduction to chemistry that is to be accomplished.

Q: Solid nickel(II) nitrate is slowly added to 75.0 mL of a 0.0636 M ammonium carbonate solution. The…

A: Note: As per the guidelines, solution of first question has been made. For the expert solution of…

Q: Consider the following reaction: COCI2(g) CO(g) + Cl₂(g) Kc = 7.3x10-4 Calculate [CO]eq, [Cl₂eq],…

A: Given, COCl2(g) ⇌ CO(g) + Cl2(g) Equilibrium constant (Kc) = 7.3 × 10-4 Initial concentration of…

Q: a. Add all implied hydrogen atoms to the skeletal structure. b. How many tetrahedral carbons are in…

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Q: A sample of gas has a volume of 0.4 L at 293 K. What is the volume of the gas at 523 K, assuming…

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Q: The first step in the mechanism for the reaction of an amine with a carboxylic acid to produce an…

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Q: (3E,5Z)-4-methyl-3,5-nonadiene (4E,6Z)-4-(1-methylethyl)-6-methyldodecadiene

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Q: What is the percent by volume concentration of a solution in which 75.0 ml of ethanol is  diluted to…

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Q: empirical formula for a compound that contains 20.24% aluminum and 79.76% chlorine.

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Q: why can Oil Red O diffuse through a lipid solvent (which simulated the cell membrane) and Methylene…

A: Oil red O - it a lipid soluble lysochrome (C26H24N4O) with maximum absorption at 518 nm. Methylene…

Q: empirical formula for a compound that is 24.74 % K, 34.76 % Mn, and the rest O

A: % of oxygen = 100 – ( 24.74 + 34.76) = 40.5 %  Let total amount of compound 100 g Therefore amount…

Q: Write the formula for the following set of ions: Al3+, F1-

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Q: 1. Consider the structure shown below and then answer the following questions. a. Complete the…

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Q: Turquoise, CuAl 6 ( P O 4 ) 4 ( OH) 8·5 H 2 O(s), is one of the most valuable non-transparent…

A: Calculate molar mass of both hydrated and anhydrous form of the mineral and then calculate the mass…

Q: Q2: Classify the quality of crude oil based on the properties listed in the table below and explain…

A: Clarify the quality  of crude oil based on properties listed in table

Q: Determine the molar mass of a gas that has a density of 2.18 g/L at 66°C and 720. mmHg. Enter your…

A: We will use ideal gas equation PV = nRT . (Value of R = 0.0821 L.atm/mol/K ) Then we will find no.…

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A: Part A: At equilibrium , 1. When there is a decrease in volume , the equilibrium will shift to…

Q: What is the hydroxide ion concentration in a solution that containing 0.50 mole of ammonium…

A: Given : No. of moles of Ammonium hydroxide = 0.50 mol No. of moles of Ammonium chloride = 0.05 mol…

Q: Calculate the heat (q) and the work (w) in Joules, which the system exchanges with the return…

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