You have a cylindrical piston with 4.0 L volume full of He gas at 27 °C. What happens to the pressure of the gas inside the cylinder if the piston is pressed down to limit the volume to 2.0 L and the system is cooled down to -123 °C? (A) Halves B) Triples Remains the same Doubles E) Quadruples

Q: What is the molarity (M) of a solution made by dissolving 4.88 g of KC1 (74.55 g/mole) in 0.423 L of…

A: mass of KCl = 4.88 gmolar mass of KCl = 74.55 g/molVolume of the solution = 0.423 LMolarity of the…

Q: Are there any other suggestions

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Q: 5. If equal volumes of the silver nitrate and aluminum chloride solutions were mixed, what value…

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Q: For Questions 20-24 consider the following scenario: A 0.8390 g of an unknown sample containing…

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Q: A public water supply was found to contain 0.8 partper billion (ppb) by mass of chloroform, .(a) How…

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Q: Convert 22 miles to kilometers if 1 inch = 2.54 cm

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Q: How many moles of hydrogen atoms are in a 2.7 g sample of H2 gas? [Express your answer to at least…

A: Given, mass of H2 = 2.7 g we know, molar mass of H2 = 2.016 g/mol we know, => moles of H2 = mass…

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Q: What mass of Cr2S3 would contain 1.0x10^24 sulfur atoms?

A: The number of sulfur atoms in the given sample of Cr2S3 = the mass of Cr2S3 that contains  is

Q: 11 OMe

A: Sorry for providing the handwritten answer. It is easier to me to draw through handwritten to show…

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Q: 12. Calculate the number of millimoles contained in 500 mg of each of the following substances: (a)…

A: Generally for moles we can use the following formula Moles=In the case of milli moles we use mass of…

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Q: 24) The molarity of a solution prepared by diluting 43.72 mL of 1.005 M aqueous K₂Cr 500 mL is A)…

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

Q: 2) How many milligrams of MgSO4 are required to prepare 43 mL of a 1.60 mM solution?

A: Molarity (M) of a solution is defined as the number of moles of solute present in the 1.0 liter of…

Q: eutralizati

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Q: 35.) when balancing chemical equations,blginning students often tempte formula (the subscripts) to…

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Q: 1. Consider the following information about four substances: Electrical Conductivity as solid as…

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A: We have find out the answer.

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Q: Me Br OMe Br à Br MeO Br Br Br

A: The objective of the question is to name the given compounds

Q: Masses :  Ca = 40.08 g   S= 32.07 g  O= 16.00 g  A 35.0 mL sample of CaSO4 was evaporated to…

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Q: Which of the following will produce a neutral solution when dissolved. Hint - will the dissolved…

A: The salts given are KF, NaCN and NH4I.

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.