General Chemistry 1

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  1. 5 SO\(_2\) + MnO\(_4^-\) + 2 H\(_2\)O \(\longrightarrow\) 5 SO\(_4^{2-}\) + 2 Mn\(^{2+}\) + 4 H\(^+\)

    Assign oxidation numbers for each of the atoms in the above net ionic equation. Identify the oxidizing and reducing agents.

  2. The density of sea water is 1.03 g/mL. What mass of seawater would fill a vessel to a volume of 255 mL?

  3. An ocean dwelling dinosaur has an estimated body volume of 1.38 x 10\(^6\) cm\(^3\). The animals's live mass was estimated at 1.24 x 10\(^6\) g. What is its density?

  4. A student collected a gas in an apparatus connected to an open end manometer. The difference in heights of mercury in the two columns was 102 mm and the atmospheric pressure was measured to be 756 mmHg. What was the pressure of the gas in the apparatus in atm?

    atmospheric pressure gas laws chemistry

  5. A sample of nitrogen has a volume of 883 mL and a pressure of 741 torr. What pressure will change the volume to 655 mL at the same temperature?

  6. What will be the final pressure of a sample of nitrogen with a volume of 955 mL at 745 torr and 25 \(^{\circ}\)C if it is heated to 62 \(^{\circ}\)C and given a final volume of 1155 mL?

  7. How many liters of hydrogen, measured at STP, are needed to combine exactly with 1.50 L of nitrogen, also at STP, to form ammonia?

    n\(_2\) + 3 H\(_2\) \(\longrightarrow\) 2 NH\(_3\)

  8. How many grams of Ar are in a 12.0 L cylinder of argon at a pressure of 57.8 atm and a temperature of 25 \(^{\circ}\)C ?

  9. The label on a cylinder of a noble gas became illegible, so a student allowed some of the gas to flow into a gas bulb with a volume of 0.3000 L until the pressure was 0.901 atm. The sample then weighed 1.45 g and its temperature was 27.0 \(^{\circ}\)C. What is the molar mass of the gas? Which noble gas is it?

  10. One procedure used to separate the isotopes of uranium to obtain material to construct a nuclear weapon employs uranium compound with the formula UF\(_6\) . The compound boils at about 56 \(^{\circ}\)C, so at 100 \(^{\circ}\)C it is a gas. What is the density of 1.00 mol of UF\(_6\) at 100 \(^{\circ}\)C if the pressure of the gas is 0.974 atm. (MM of U = 352.0 g/mol)

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