3.45 m^3 of helium at 2.65 middot 10^5 pa are held at 156 C. How many...
A spherical balloon of volume 3.90 times 10^3 cm^3 contains helium at a pressure of 1.15 times 10^5 Pa. How many moles of helium are in the balloon if the average kinetic energy of the helium atoms is 3.60 times 10^-22 J? mol
Shireen measures the gauge pressure, p_g = 3 atm, volume, V = 2 m^3, and temperature, T = 126.85 degree C, of an ideal gas. What is the correct number of moles of this gas in terms of the gas constant R? (assume 1 atm = 1 times 10^5 Pa; 1 Pa = 1 N/m^2) A. 500 N middot m middot K^-1/R B. 1000 N middot m middot K^-1/R C. 1500 N middot m middot K^-1/R D. 2000 N middot...
A 20.6-L tank contains 0.206 kg of helium at 16.4°C. The molar mass of helium is 4.00 g/mol. (a) How many moles of helium are in the tank? mol (b) What is the pressure in the tank, in pascals and in atmospheres? Pa ? atm?
A gas in a cylinder is held at a constant pressure of 2.3X 10^5 Pa and is cooled and compressed from 1.70 m^3 to 1.20 m^3. The internal energy of the gas decreases by 1.4 X 10^5 J. a) Find the work done by gas. b) Find the absolute value of Q of the heat flow into or out of the gas, and state the direction of the heat flow. c) Does it matter whether the gas is ideal? why...
A cylinder of volume 43.8 L helium is filled to a gauge pressure of 1.72 x 10^7 Pa in a cylinder. a) With that amount of helium, how many balloons can be inflated to a volume of 4.0 L and pressure of 1.01 x 10^5 Pa, assuming that the balloons and the cylinder are at the same temperature? b) If the temperature of the balloons is 77 degrees Fahrenheit, then how many moles of helium are in one balloon? c)...
What if we want to go back? 1. How many formula units of Na2SO4 contain 3.45 x 1025 sodium ions? 2. How many moles of Na2SO4 contain 3.45 x 1025 sodium ions? 3. How many grams of Na2S04 contain 3.45 x 1025 sodium ions? molar mass Avogadro's number chemical formula Mass in grams Moles Number of formula units Number of atoms or ions
3 mol of helium gas are held in a 1-L container at 20◦C (1000 L = 1 m3).1. Assuming the helium acts like an ideal gas under these conditions, what is the pressurepof the gas in kPa? (3 pts)2. Recalculate the pressure of the gas using the Van der Waals equation. What is theratio of this pressure to that from part 1? The Van der Waals constants for helium area= 3.46×10−3Jm2/mol2andb= 2.38×10−5m3/mol. (4 pts) 3 mol of helium gas are...
Two protons arc held at a separation of 2.000 times 10^-10 m. How much electric potential energy do they have? (Use k = 9.00 times 10^9 N middot m^2/C^2) 5.760 times 10-9 J 1.152 times 10^-18 J 3.467 times l0^-18 J 3.467 times 10^-18 J 7.200 times 10^10 J The same two protons of question 13 arc now pushed until their separation is 3.000 x 10*12 m. What was the change in potential energy of the protons? (Use it =...
How many mL of 3.53 M HNO3 will be needed to neutralize 159 mL of 3.45 M Ba(OH)2.
How many atoms are in a) 1 g of 12C? b) 1 cm3 of helium at a pressure p = 105Pa and T = 273 K? c) 1 kg of nitrogen gas (N2)? d) In a steel bottle with 10 dm3 volume of H2 gas at p = 106 Pa?