How many grams of He are necessary to fill a balloon having a volume of 4.5E3 mL to a pressure of 1.14E3 torr at 25.0ºC?
How many grams of He are necessary to fill a balloon having a volume of 4.5E3...
How many grams of methane gas were used to fill a balloon to a volume of 3.0 L at STP?
Homework to 1. How many grams of 75% solution can you prepare from 12.300g of glucose? 2. How many g of Na S, are in 125ml of 0.25M solution? 3. How many grams of water do you need to add to 350g of 15% solution to prepare 6.0% solution? 4. Please assign a physical state fitting this description: - constant volume, variable shape: - variable volume, variable shape - constant volume, constant shape 5. You fill a party balloon with...
A weather balloon is helium filled to a volume of 7240ft3. Calculate the number of grams of helium required to inflate this balloon to a pressure of 745 torr at 21 degrees Celsius.
How many moles of a gas fill a flask with a volume of 145 mL at 99 degree C and a pressure of 757 torr? If a student finds the molecular weight of an unknown liquid to be 111 g/mole and the molecular formula of the liquid is CHCl_3, what is the percent error in the student's molecular weight?
A balloon is filled with He gas at 293K and 0.35 atm to a volume of 355 ml. How many moles of He gas molecules are in the balloon?
I need help in these questions: please help ! 1. A balloon containing 157 moles of ammonia gas has an initial volume of 60.0 mL at a temperature of 80.0 C. What is its final temperature when the volume is reduced to 50 mL? 2. An atmospheric sample contains nitrogen at 554 torr, carbon dioxide at 170 torr and oxygen. Assuming STP conditions and a total of 10.0 moles of the gas mixture, what is the partial pressure of oxygen...
a balloon sample of helium has a volume of 550 mL at a pressure of 1.0 atm. assuming no change in temperature or amount of helium what is the new volume in mL if the pressure drops to 8.5 psi? Question 29 Given 1 atm = 760 torr = 760 mmHg = 14.7 psi. A balloon sample of helium has a volume of 550 mL at a pressure of 1.0 atm. a. Assuming no change in temperature or amount of...
A 1.2 mol sample of Kr has a volume of 867 mL. How many moles of Kr are in a 3.22 L sample at the same temperature and pressure? A 8.90 mol sample of freon gas was placed in a balloon. Adding 3.50 mol of freon gas to the balloon increased its volume to 13.4 L. What was the initial volume of the balloon? A mixture of He Ne, and Ar has a pressure of 20.7 atm at 28.0 °C....
Exercise 6.4 • How many moles of gas will occupy a 750 ml volume at 25°C and 0.42 atm pressure? . 2 If the argon gas in a light bulb exerts a pressure of 0.54 atm at 20°C. what pressure will it exert at 160°C? 3 What is the molar mass of a gas if 0.21 g occupies a 0.13 liter volume at 80°C and 0.92 atm pressure? - How many grams of ammonia gas, NH,, are there in a...
A balloon has a volume of 3.71 liters at 23.3degreeC. What will be the volume (in milliliters) of the balloon at 100degreeC? Assume the pressure doesn't change and the amount of gas in the balloon doesn't change. There are 1,000 mL in 1 liter. How many neutrons does^36_S have?^35S has a half-life of 88 days. You start with 141 micrograms of^35S. How many7 micrograms are left after 264 days?