(c) Helium has molar mass 4x 10-3 kg mol-1. Find the total mass of N 1025...
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 12.0 L tank contains 0.305 kg of helium at 16.0 ∘C. The molar mass of helium is 4.00g/mol. 1)How many moles of helium are in the tank? 2)What is the pressure in the tank (in pascals)? 3) What is the pressure in the tank ( in atm)?
A 11.0 L tank contains 0.234 kg of helium at 20.0 ∘C. The molar mass of helium is 4.00 g/mol . A) How many moles of helium are in the tank? B) What is the pressure in the tank, in pascals? C) What is the pressure in the tank, in atmospheres?
If the molar mass of helium is 4.0 g/mol4.0 g/mol and the molar mass of neon is 20.2 g/mol20.2 g/mol, then... a) All the atoms have exactly the same velocity. b) All the atoms have the same average speed. c) The average speed of the helium atoms is greater than the average speed of the neon atoms. d) The average speed of the neon atoms is greater than the average speed of the helium atoms. e) The atoms diffuse from...
A 11.0 L tank contains 0.280 kg of helium at 18.0°C. The molar mass of helium is 4.00 g/mol Part B What is the pressure in the tank, in pascals? Express your answer in pascals. IVO AXO ao ? Submit Request Answer Part What is the pressure in the tank, in atmospheres? Express your answer in atmospheres. VO Alicbm O ? p= 197 atm Submit Previous Answers Request Answer X Incorrect; Try Again: 4 attempts remaining
(d) Helium gas has c 2.5 mol-K-. n 100 mol of helium gas ini- tially has volume 0.2 m3 and pressure 5 x 106 Pa. Find the energy transfer by heating if pressure increases by 50% due to an isochoric process. (You do not need to know n but I include it in case you use a different method)
Helium gas has cv = 12:5 J mol^-1K^-1. n = 100 mol of helium gas ini- tially has volume 0.2 m3 and pressure 5 106 Pa. Find the energy transfer by heating if pressure increases by 50% due to an isochoric process. (You do not need to know n but I include it in case you use a dierent method).
Find the average molar mass of a mixture of 10 mol N2, 4 mol Ar and 7 mol He. Group of answer choices a) 29.1 g/mol b)16.4 g/mol c)22.3 g/mol d)37.6 g/mol e)7.9 g/mol
Verizon LTE 14:34 183% Question 18 of 37 Submit A 52-kg woman has 7.2x 10-3 mol of hemog lobin (molar mass =64456 g/mol) in her blood. How many hemoglobin molecules is this? х STARTING AMOUNT ADD FACTOR RESET ANSWER 7.2x 10-3 64456 g hemoglobin 6.022 x 1023 1.1 x 10-7 g/mol molecules hemoglobin 4.3x1021 460 mol hemoglobin 1.2x 10-26
D. MORE PRACTICE... Molar mass (g/mol) of moles 1. Complete the table below. Substance Mass® 2. Aspirin tablet (C4H4O) 0.325 b. Wooden stick LCH:0) 14.482 c. Copper wire (Cu) 1.809 Show work below. 2. A substance has a mass of 90.10 grams and contains 3.02 x 10" molecules. Which of the 3 substances in the chart above is it? Explain. 165 3. Find the % composition of each element in aspirin.