Which sample contains more molecules?
a) 20.0 L of steam (gaseous H2O) at 144.0 ∘C and 1.07 atm pressure |
b) a 63.5 mL of water at 57 ∘C |
Which sample contains more molecules? a) 20.0 L of steam (gaseous H2O) at 144.0 ∘C and...
17.which sample contains more molecules, 15.0L of steam (H2O (9)) at 123.0°C and 0.93 atm or 10.5g of ice (H2O (s)) at -5°C? Please show your calculation for the number of molecules in each sample for full credit. (9) 18. a 0.123 g sample of a gas occupies 124mL at 120°C and 760 torr. What is the molar mass of the gas? (6) 19. A gas sample has a volume of 4250mL at 15°C and 745mmHg. What is the new...
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law? Which sample contains more molecules: 2.0 L of Cl2 at STP or 3.0 L of CH at 300K and 1150 mmHg? Which sample weighs more? Which sample contains more molecules: 2.0L of CO2 at 300 K and 500 mmHg or 1.5 L of N2 at 57 °C and 760 mmHg? Which sample weighs more? 8.78 8.79 8.80 If 2.3 mol of He has a volume of 0.15 L at 294 K, what is in atm? In psi?...
* At STP, which sample contains twice the number of molecules found in 4.00 L of hydrogen gas? * What is the volume of 3.00 mol of neon gas at STP? * The mass of 5.6 liters of a gas at STP is 11 g. Find the identity of the gas. * Find the volume of 6.00 g of hydrogen at 1.50 atm and 273 K? * At which pressure would a 2.60 mol sample of gas at 20.0°C have...
Question 7 (1 point) A sample of gaseous neon has a volume of 68.2 Lat STP. How many moles of neon are in the sample? 0.328 moles 3.04 moles 68.2 moles 1530 moles 4.11 X 1025 moles Question 8 (1 point) The temperature of a gas at 1.00 atm and 8.00°C is increased to 20.0°C resulting in a change of pressure. Which equation would you use to calculate the new pressure? P: V1 = PzV2 OP/V1 = P2/V2 O P₂...
When water changes from the liquid phase to the gaseous (vapor) phase, energy is required for the H2O molecules to escape their mutual molecular attraction (the internal energy change ufg in the steam tables) and for the volume expansion (P·vfg). The total heat of vaporization for the phase change is represented by the enthalpy change hfg in the steam tables. Use the steam tables to calculate the fractions of energy for the volume expansion and for the molecules to escape...
1)a If a sample of oxygen gas has a volume of 4.89 L at 20.0 °C and a pressure of 1.20 atm. If the temperature was increased to 56.0 °C then what would its resultant volume be (in L?) Assume the new pressure is 1.20 atm. b At STP, 297.0 mL of a certain gas has a mass of 0.366 g. What is a possible identity of this gas? Select one: a. O3 b. Cl2 c. C2H6 d. O2 e....
Homework week 6 1. How do gaseous, liquid, and solid methanol (CHO) compare in each of the following features: (a) density; (b) the space between the molecules; (c) the attractive force between the molecules? 2. Convert each pressure unit to the indicated unit. a. 3.0 atm to mm Hg b. 720 mm Hg to psi c. 424 mm Hg to atm 3. A sample of nitrogen gas has a volume of 15.0 mL at a pressure of 0.50 atm. What...
If a sample of oxygen gas has a volume of 4.89 L at 20.0 °C and a pressure of 1.20 atm. If the temperature was increased to 56.0 °C then what would its resultant volume be (in L?) Assume the new pressure is 1.20 atm.
Considering the nature of a diatomic molecule, a (6.00) L cylinder contains nitrogen gas at (20.0 ) C and a pressure of (2.30)) atm. Find the root mean square speed of the molecules. The mass of one nitrogen gas molecule is 4.65 × 10-26 kg Give your answer in m/s with 3 significant figures.
1) A 3.00-L flask is filled with gaseous ammonia, NH3. The gas pressure measured at 20.0 ∘C is 1.15 atm . Assuming ideal gas behavior, how many grams of ammonia are in the flask? Express your answer to three significant figures and include the appropriate units.