Physics, 13.12.2019 20:31, HugoArellano
In 1992, a danish study concluded that a standard toy balloon, made from latex and filled with helium, could rise to 10,000 m (where the pressure is 1/3 of that at sea level) in the atmosphere before bursting. in the study, a number of balloons were filled with helium, and then placed in a chamber maintained at −20°c. the pressure in the chamber was gradually reduced until the balloons exploded, and then the researchers determined the height above sea level corresponding to that pressure. assume each balloon was filled with helium at +20°c and at about atmospheric pressure. determine the balloon's volume just before it exploded, if its volume when it was first filled was 640 cm^3.
Answers: 2
Physics, 22.06.2019 10:00, lorelei7668
(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present
Answers: 3
Physics, 22.06.2019 23:00, aliyyahlove
Awelder using a tank of volume 7.50×10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30×10^5 pa and temperature of 37.1 ∘c. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 ∘c, the gauge pressure of the oxygen in the tank is 2.00×10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.
Answers: 3
In 1992, a danish study concluded that a standard toy balloon, made from latex and filled with heliu...
Mathematics, 08.12.2020 22:50
Chemistry, 08.12.2020 22:50
Mathematics, 08.12.2020 22:50
Health, 08.12.2020 22:50
English, 08.12.2020 22:50
Mathematics, 08.12.2020 22:50
Geography, 08.12.2020 22:50