Spring Practice Chemistry Final

Determine the VOC in Element B: You will need to multiply 1.2 pounds of VOC per

1. The pressure announced on last night's television weather broadcast was 29.92. Explain how this was measured and give the units. Would this be considered an unusually large or low pressure value?

d. A typical can of soda is 355 ml. How many liters are there in this can of soda? (4 points)

(a) What is the capacity (saturation missing ratio) of the rising air at 3000 feet?

Step 1: The volume of the quarter-sphered tank rounds up to 478,676. You use the condition to find the volume.

Can I apply this somehow to volume? Well at standard temperature and pressure (STP) a mole of a gas will occupy 22.4 liters. So If we keep our units straight we should be able calculate a given volume of gas from moles. Check it out…… http://www.sciencegeek.net/Chemistry/Video/Unit4/GMV4.shtml

6. Restate your predictions that were correct and give the data from your experiment that supports them. Restate your predictions

A chemistry teacher has 2,342 grams of a substance and he wants to separate the substance into 7-oz jars. How many 7-oz jars can he fill?

43. If 750 milliliters of oil were poured from the 4.75 liter container, how many liters of oil remain.

28) A basketball is inflated to a pressure of 1.90 atm in a 24.0°C garage. What is the pressure of the basketball outside where the temperature is -1.00°C? A) 2.08 atm B) 1.80 atm C) 1.74 atm D) 2.00 atm 29) The density of a gas is 1.43 g/L at STP. What is the gas? A) Cl2 B) O2 C) S 30) Zinc reacts with aqueous sulfuric acid to form hydrogen gas: Zn (s) + H2SO4 (aq) → ZnSO4 (aq) + H2 (g) In an experiment, 201 mL of wet H2 is collected over water at 27°C and a barometric pressure of 733 torr. The vapor pressure of water at 27°C is 26.74 torr. The partial pressure of hydrogen in this experiment is __________ atm. A) 1.00 B) 706 C) 0.929 D) 0.964 E)

2. Note that the balloon in the chamber is filled with 0.300 moles of an

3. The volume of a fixed mass of a liquid sample increases as the temperature rises from 20 to

The Acme Life Preserver Company needs to fill up a position within their company and they want to develop a new line of life preserves that inflate when the seal is broken with two mixing chemicals. Applicants must formulate and test a formula that gives the volume of the life preserver with the smallest amount of sodium bicarbonate that mixes with an excess of 1.0 M HCl and pressure of 1300 torr to inflate the life preserver. The balanced equation used to determine the volume of the life preserve

The hydrochloric acid is put into a calorimeter and then the zinc is added after. The lid is closed after the zinc is added and a thermometer is inserted through the lid in order to check the temperature as the reaction takes place . The temperature is measured until the reaction has completed and the highest temperature is used as the final temperature. ∆T is then found by the equation ∆T=Tfinal-Tinitial. Then according using the equation ∆H=mc ∆T+PV. In this lab the pressure remains constant while the volume is changing. In order to calculate the volume the same reaction with the same amount of zinc and hydrochloric acid is used. However, instead of a calorimeter, an erhlenmeyer flask with a balloon put over the top is used. The hydrochloric acid is placed into a flask, the zinc is placed inside the balloon and then sealed over the flask. By dropping the zinc into the flask the reaction occurs. This allows the H₂ gas to be captured in the balloon. The circumference of the balloon is then found. The circumference can then be applied to the equation C=2πr and the radius is determined. Using the radius of the balloon, in the equation V=(4/3)πr³ the volume taken up by the hydrogen gas can be found. The pressure is the pressure of the air which is measured with a barometer. ∆H can be found by multiplying the mass of hydrochloric acid, the specific heat of HCl, and ∆T of the hydrochloric

Predict: If the added mass on the lid was 50 kg, a total mass of 60 kg would exert pressure on the gas inside the container. What would be the volume of the gas? __.42 ______________