On a cool spring morning (T = 5.74 oC), a mechanic inflates a customer's tires to the manufacturer's recommended pressure of 32.9 PSI.  That afternoon, the temperature unexpectedly soars to 22 oC.  Assuming there is no change in the volume of the tires, determine the pressure in the tires in the afternoon. Give your answer in PSI.  (1 PSI = 6894.76 Pa)

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Q: What mass of Silver Chromate is produced Silver nitrate ? 4.65 mol from 2 AgNO3 + Na₂ CrO4 → Ag₂ Cr…

A: the concept used here is mole concept.

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Q: 3. Under what condition will the changes in enthalpy and internal energy be identical?

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A: 2H+(aq) + 2e– → H2(g);   0.00 VRb+(aq) + e– → Rb(s);.   –2.98 VF2(g) + 2e– → 2F–(aq);    2.87…

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Q: What is the IUPAC name of this molecule? CH3-O-CH₂CH3

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Q: 1. A gas has a temperature of 14ºC, and a volume of 4.5 liters.  If the temperature is raised to…

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Q: e 2-methylheptan-4-one What would be present in the IR spectra of 2-methylheptan-4-one?

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Q: Calculate either [H3O+] or [OH−] for each of the solutions at 25 °C. Solution A: [OH−]=1.95×10−7 M;…

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Q: calculate Keq from the reaction Cu2+ + 4NH3 = [Cu(NH3)4]2+

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Q: What is the molar mass of Co(NO3)2 6H2O? Show your calculations.

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.