Chemistry Answers

If 149.1 g of KCI is dissolved in water to make 500 ml solution, what is the molarity of the solution?

A copper metal with a mass of 7.56g cools from 65.1⁰C to 11.2⁰C. Find the heat released by the metal.

(10g/L)/(2g/mol)

NH3+O2=NO+H2O IF 25G NH3 is reacted with 20g O2, which is the limiting reagent? How much NO will be formed in the reaction?

A commercial bleach solution contains 3.62 mass percent NaOCl in water. calculate molality of the solution.

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    i.       How many kilojoules of heat are absorbed when 0.46 g of chloroethane (C₂H₅Cl, boiling point 12.3˚C) vaporizes at its normal boiling point? The molar heat of vaporization of chloroethane is 26.4 Kj/mol.

Determine the minimum volume of 0.50 mol/L calcium chloride solution required to precipitate 14 g of calcium carbonate when mixed with excess sodium carbonate

Mole of Ar atoms moving at 650 m/s

Arsenic and oxygen react together to form arsenic oxide.  A sample of arsenic contains 0.4774 g, and a sample of oxygen contains 0.2043 g.  What is the formula of the arsenic oxide formed?