I don\'t know where I\'m messing up. I need to get both calculations to R=0.0820

Question

I don't know where I'm messing up. I need to get both calculations to R=0.08206

Safety Precautions Hydrogen gas is highly flammable. There should be no open flames or electrical sparks in the area contact. Avoid inhaling the HCl is a corrosive solution that can cause skin irritation. Prevent eye, skin, and clothing vapors. If any acid is spilled, clean it up following the instructions of your laboratory instructor Procedure low the metal tweezers 1. Hold a piece of magnesium ribbon with tweezers and dip it into 0.1 M HC1. Do not al to come into contact with HCI. Whe rinse it with DI water, and pat dry. Weigh the magnesium and record its mas 0.073-0.085 g Mg n the surface shows no trace of oxide (MgO), remove the magnesium s accurately. You should ha 2. Construct an apparatus for collecting hydrogen gas a) Pour 4 mL. of 6 M HCI into a 200 mm test tube. Attach a rubber stopper with tubing to the test tube, and clamp the test tube to a ring stand. b) Insert U-shaped glass tubing end into an 800 mL beaker containing about 600 mL of water c) Fill a gas buret with water. Place your finger over the end of the buret and invert it over the end of the glass U tube below the surface of the water in the beaker. Secure the gas buret to the ring stand with a buret clamp d) Obtain your instructor's approval. Make sure all connections are airtight and that no air has entere buret 3 Remove the rubber stopper and quickly drop the Mg into the Het Reptace the stopper qufteklyo Altowthe eactiop to proceed tocompletion 4. Place your finger over the end of the gas buret and transfer it to below the water surface in a leveling tank. Remove your finger and raise or lower the buret until the water level in the gas buret is the same as the water level in the tank. The pressure of the "wet" hydrogen gas you generated now equals the atmospheric pressure in the room. Read the gas buret and record this volume. 5. Record the temperature of the water in your 800 mL beaker. This is the temperature at which the hydrogen 6. Empty the contents of the test tube in the sink under running water. Repeat steps 1-5. Each pair of students 7. Calculate the value of R. Collect class data to obtain an average and calculate a standard deviation. Show all gas was produced. Check with your instructor about today's atmospheric pressure. should generate two burets of hydrogen gas. calculations

Explanation / Answer

No, the answer should not be 0.08206 because R has this value when units are L atm/K-mol

But in the given problem the units of R are mL not L, so the answer should be 82.06 mL atm/K-mol

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