1.) What is the volume percentage of a solution prepared by dissolving 34g of Na

Question

1.) What is the volume percentage of a solution prepared by dissolving 34g of NaOH in enough water to make a final volume of 120 mL? (SHOW WORK) How many mL of a 10% solution can be made from the solution in part a? (SHOW WORK)

2.) Given the molar mass of H3PO4 is 97.994 grams, determine the number of grams of H3PO4 needed to prepare 1.20 L of a .8 M H3PO4 solution. (SHOW WORK) What volume in liters of a .8 M H3PO4 solution can be prepared by diluting 50 mL of a 3.5 M H3PO4 solution? (SHOW WORK)

3.) Rhenium (Re), with a mass number of 187 and an atomic number of 75, decays by beta emission. Identify the product of the nuclear reaction by providing its atomic symbol, mass number, and atomic number.

4.) Outdoor jacket is made of polyester, outdoor dinnerware is made from Melmac, and you are drinking water from a polycarbonate bottle. Describe the structure of the polymer for each of the items, and how the structure of the polymer enables the production of this product.

5.) Al + Cl --> AlCl3

a.) Balance the equation

b.) How many moles of AlCl3 are produced from .55 mol of Cl2? (SHOW WORK)

c.) What is the molar mass of AlCl3? (SHOW WORK)

d.) Calculate the number of grams AlCl3 produced from .55 mol Cl2. (SHOW WORK)

Explanation / Answer

2)0.8M H3PO4 = 0.8 x 97.994 =78.3952
for 1.2 liters amt required = 78.3952 x1.2 = 94.074 gm

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