A sample of helium Has a volume of 3.20x102 mL STP. What will be it's new volume if the temperature is increased to 425.0 K and it pressure is increased to 3.50 atm?

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Q: A chemist must prepare 450.0 mL of nitric acid solution with a pH of 1.60 at 25 °C. He will do this…

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Q: A1 75 liter bottle of vinegar has a percent by volume of 5.5%. How many liters of vinegar (CH CO0…

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Q: 19.) Consider the following reaction, determine the temperature at which it is spontaneous? SO3 (g)…

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Q: mplete the table below. Be sure each of your answer entries has the correct number of significant…

A: Ans. (i) Conjugated acid for weak base CH3NH2:          CH3NH3+ Ka = KwKb=1×10-144.4×10-4…

Q: How many moles of calcium atoms do you have if you have 8.99 x 1021 atoms of calcium. (The mass of…

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Q: 5. How many calories are needed to heat 50 g of ice at -17 deg C to steam at 115 deg C? C (ice) =…

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Q: What quantity in moles of potassium atoms do you have if you have 7.50 x 10²² atoms of potassium.…

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Q: Save Antwer Which substance is the limiting reactant when 2.0 g of S reacts with 3.0 g of O2 and 4.0…

A: Given chemical Reaction :-  S(s) + O2(g) + NaOH(aq) --> Na2SO4(aq) + H2O(l)  2.0 g of S and 3.0 g…

Q: 1. a) The graph shown on the right shows the titration curves of a 14 1 M solution of a weak acid…

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Q: Primary amine Secondary amine Tertiary amine Answer Bank NH2 но. -CH2-CH2-NH2 CH, CH H2 HO но OH

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Q: Which of the following 1.0 M solutions would have the highest pH? Weak Acid Ka HCN 4.9 x 10-10 HNO2…

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Q: Provide reagents and conditions to produce the products indicated. CH3 CH3 CH3 CH3 -CH3 CH3 -CH3 CH3…

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Q: oue: what is ithe empiral formula ot the compouond that has a molecular formula of EgHi2O3? ® Cg H12…

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Q: Give the family or class to which the following structures belong. Please be specific. Answer:

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Q: For the reaction: SnO, (s) + 2 CO(g) + 2 CO, (g) + Sn(s) Solve for AH° = 0.123 X kJ Solve for AS° =…

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Q: What is the pH of a 0.677 M weak base solution? The K_{b} of the weak base is 0.000017.

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Q: 5.3 × 1025 molecules of CO, a oduced in a combustion react hat is the mass in kg of CO2 th pduced?

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Q: (NEL), CO) 1 The molal boiling point elevation constant K =0.80 °C-kg mol for a certain substance X.…

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Q: 52. Draw condensed formulas for the following compounds. # CH3 H Hー5ー5 b. 4-ethyl-2,3-gimetovhentane…

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Q: What common ion do HF, HCI, HBr and HI produce when dissolved in an aqueous solution?

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Q: Why is the titration done with vigorous swirling?

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Q: 1. Use the thermodynamic values in the table below to determine enthalpy, entropy, and free energy…

A: The balanced copper/Zinc cell reaction is: Zn(s) + Cu2+(aq) → Cu(s) + Zn2+(aq)

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.