CHEM101L Lab Exam 8

Lab 7: Gas Law Pre-Lab Questions 3. Your cousin made a bad life choice and went to Dominican College instead of STAC. He is also taking General Chemistry Lab this semester. Instead of reacting Mg with HCl, he is supposed to react zinc, Zn with HCl and performed a similar experiment. He reacted a 0.063 g sample of zinc with excess 1 M HCl at 24 °C (both lab and water temperature). The reaction produced a gas that expanded to a volume of 25.0 mL. The atmospheric pressure was 760 mmHg on the day he performed the experiment. a. Write the balanced equation for this reaction. HCI b. What is the pressure (in atm) of the H₂ gas that was produced? Remember to take into account the vapor pressure of water. c. What is the temperature in Kelvin? Name: d. How many moles of H₂ moles of H₂ should you produce with this amount of starting material? 116 e. Using the P, V, T, and n listed above, solve for your experimentally determined value of the Ideal Gas Constant, R. ***

All changes saved 10. A sample of gas stored at STP has a volume of 7.0 L. The gas is cooled to 250 K and expands to a volume of 8.0 L. What is the pressure of the gas after it is cooled? 40.1 kPa 160 kPa 80.1 kPa E 250 kPa | 11. Which question can be answered using the scientific method? D Which kind of wax melts faster? How do bees make wax? Who discovered wax? What kind of wax are crayons made of? PREVIOUS 1-50 of 50 NEXT REVIEW

For the following sets of pressure/volume data, calculate the new volume of the gas sample after the pressure change is made. Assume that the temperature and the amount of gas remain constant. V = a. V = 123 mL at 738 mm Hg = ? mL at 777 mm Hg Volume = mL b. V = 208 mL at 1.11 atm V = ? mL at 0.852 atm Volume = mL c. V = 3.19 L at 102 kPa V = = ? L at 138 kPa Volume =

For the following sets of pressure/volume data, calculate the new volume of the gas sample after the pressure change is made. Assume that the temperature and the amount of gas remain constant. a. V = 113 mL at 737 mm Hg V = ? mL at 790. mm Hg Volume = mL D b. V = 207 mL at 1.06 atm V=? mL at 0.950 atm Volume = mL c. V = 3.70 L at 113 kPa V = ? Lat 131 kPa Volume= Submit Answer APR 30 2 Retry Entire Group Show Hint L tv C C 9 more group attempts remaining [References] 7 A Previous Next > Save and Exit 24

Number 7

ing Boyle's Law A cylinder is filled with 10.0 L of gas and a piston is put into it. The initial pressure of the gas is measured to be 198. kPa. The piston is now pulled up, expanding the gas, until the gas has a final volume of 79.0 L. Calculate the final pressure of the gas. Round your answer to 3 significant digits. gas kPa piston Explanation cylinder Check S 4 5 & Ⓒ2023 McGraw 8 Rights Reserved. Terms of Use Privacy Cer Arya

A. Molar Volume of Hydrogen Gas mass of magnesium 0.150 g 0.139 g volume of hydrogen gas 158 ml 141 mL temperature of hydrogen gas 23.0 22.0°C °C atmospheric pressure (see barometer) 759 mm Hg 759 mm Hg vapor pressure of water (see table 1) 21 mm Hg 20 mm Hg partial pressure of hydrogen gas 738 mm Hg 739 _mm Hg Correct the volume of hydrogen gas to STP for trial 1 (see Example Exercise 1). volume of hydrogen gas (STP) mL mL He Show the calculation for the moles of hydrogen gas for trial 1 (see Example Exercise 1). moles of hydrogen gas mol Show the calculation for the molar volume of hydrogen gas at STP for trial 1. mol Molar volume of hydrogen gas (STP) L/mol L/mol

A balloon is filled with helium gas to a volume of 2.5 L at a pressure of 99.6 kPa and a temperature of 24 °C. What Gas Law am I using if I decide to keep the pressure of the gas constant, and I manipulate the temperature to find the new volume of the gas? H Li Na Mg Rb Be Ca Sc Fak Sr Cs Ba Fr Ra Act La La Boyle's Law Ideal Gas Law MB Charles's Law Gay-Lussac's Combination Law Periodic Table of the Elements H KID Hf Ta W Re Os Ir Symbel 2023 Cr Mn Fe Co Ni Cu 40 41 42 MA Zr Nb Mo Tc Ru Rh Pd Ag Cd TH 10 Rf Db Sg Bh Hs Mt Ds Basic 1980 H 45 Pt Au Hg B 14 15 14 17 2 Ga Ge "Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Np Pu Am Cm Bk Cf Es Fm Md No Ac Th Pa As Se Br LIRIUM VILA Cl Ar He 53 40 54 Sb Tl Pb Bi Po At Rn Rg Cn Uut FI Uup Lv Uus Uuo T Xe

Show the work to sample 1,2 and 3.

Hi! I need answers on the last two multiple-choices question. The overview of the experiment can be seen in the picture. This is experiment is about testing the Ideal Gas Law.

Part 1: Gas Laws The physical properties of gases can be explained using four variables; volume (V), pressure (P), temperature (T), and amount in number of moles (n). Four simple laws are used to explain the behavior of gaseous species. Complete the table below to summarize the four gas laws. Name of the gas Properties that Properties that Gas law equation Gas law explanation law stay constant are changing n and T P:V1 = P:V2 Charles's law T and V are directly proportional. (as T increases V also increases) Pand T P1 P2 T1 T2 Avogadro's law V and n

Please help with question 2 a-c

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Can you answer questions 7-10 please I don’t understand them

Part IV:  Relationships Between Gas Variables   Scientists in the late 1800’s noted relationships between many of the state variables related to gases (pressure, volume, temperature), and the number of gas particles in the sample being studied.  They knew that it was easier to study relationships if they varied only two parameters at a time and “fixed” (held constant) the others.  Use the simulation to explore these relationships.   Variables Constant Parameters Relationship Proportionality (see hint below) pressure, volume     directly proportional or inversely proportional volume, temperature     directly proportional or inversely proportional volume, number of gas particles     directly proportional or inversely proportional   Hint: A pair of variables is directly proportional when they vary in the same way (one increases and the other also increases).  A pair of variables is inversely proportional when they vary in opposite ways (one…

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Al changes saved 23. The combined gas law uses multiple variables to show the relationship between the volume, the pressure, and the temperature of gases. What is the mathematical relationship between these three variables? O RT Vi PT V2 %3D PVT = PVT, %3D T2 %3D PV PV2 O PV PV2 %3D T

The density of nitric oxide (NO) gas at 1.21 atm and 39.9°C is ________ g/L. 0.708 1.41 0.370 0.0471 11.1

Both of these please ?

A sample of oxygen gas at a pressure of 1.14 atm and a temperature of 253 °C, occupies a volume of 613 mL. If the gas is cooled at constant pressure until its volume is 525 mL, the temperature of the gas sample will be _____ °C.