Answer:
The ratio of the number of moles in the heated balloon to the original number of moles is less than 1.
Explanation:
When the air of the hot-air balloon is heated, its density decreases. It means that the molecules inside the balloon (at 58°C) occupy a bigger volume than the same amount of molecules at the beginning of the process (which are at 21°C). Due to the fact that the balloon envelope is flexible but not infinitely, part of the molecules tha were originally inside the balloon must flow out in order to release some additional space inside the balloon for the remaining molecules. This extra space makes possible a relatively constant difference of densities between the air inside and the air outside, which gives buoyancy to the balloon. And this is why the amount of moles in the balloon is slightly lower after heating than it was originally.
Since the scientists found a fossil from a modern day badger from the Holocene geologic epoch, the badger would be mostly the same, as this is the most recent, and still on going geologic epoch, starting from little less than 12,000 years ago. If the scientist wants to find a fossilized remains of earlier badgers, thus of their ancestors from the Pleistocene epoch, than the scientist should dig deeper. Not a lot deeper though, as the layers of rock from the Pleistocene are just bellow the layers of rock from the Holocene, as the Pleistocene is the second youngest geologic epoch, being the predecessor of the Holocene.
Answer:atmosphereExplanation:
Answer:
1) Use a stronger battery
Explanation:
I'm going to quote Northeastern University (I could try to type out an explanation but this will probably be more concise)
"Electromagnets are made of coils of wire with electricity passing through them. Moving charges create magnetic fields, so when the coils of wire in an electromagnet have an electric current passing through them, the coils behave like a magnet."
4) So, if the coils are creating a moving charge, and there are more coils, each coil will be "setting up" its own magnetic field. This means that less coils will make the electromagnet weaker
2) Because it is an electro<em>magnet, </em>a plastic nail is not going to produce the same effect. An electromagnet is picking up metal, and it is not picking up plastic. This is because plastic (a material with low permeability) does not have a magnetic field that is able to interact with a magnet.
[Permeability is a measure of how easily magnetic lines of force can pass through a material.]
3) There's not really a point that I can imagine of gluing the wire to the nail. Glue would put more distance between the nail and the magnet than nothing being there at all.
1) More voltage in a battery produces a larger current in the wire. This means that the strength of an electromagnet is affected by the voltage/strength of the battery. So, a stronger battery would make the electromagnet stronger, and a weaker battery would make the electromagnet weaker.
The given question is incomplete. The complete question is :
Nitrogen forms a surprising number of compounds with oxygen. A number of these, often given the collective symbol NOx (for "nitrogen + x oxygens") are serious contributors to air pollution. They can often be interconverted, sometimes by reaction with oxygen or ozone (O3) in the air. An atmospheric scientist decides to study the reaction between nitrogen trioxide and oxygen that produces nitrogen dioxide and ozone. He fills a stainless steel reaction chamber with 7.4atm of nitrogen trioxide gas and 3.6atm of oxygen gas and raises the temperature considerably. At equilibrium he measures the mole fraction of ozone to be 0.17. Calculate the pressure equilibrium constant Kp for the equilibrium between nitrogen trioxide, oxygen, nitrogen dioxide and ozone at the final temperature of the mixture. Round your answer to 2 significant digits.
Answer: Thus the pressure equilibrium constant for the equilibrium between nitrogen trioxide, oxygen, nitrogen dioxide and ozone at the final temperature of the mixture is 0.365
Explanation:
The balanced chemical reaction is:
initial : 7.4 atm 3.6 atm 0 atm 0 atm
At eqm: (7.4-x) atm (3.6-x)atm x atm x atm
Total pressure at equilibrium = (7.4-x) + (3.6-x) + x + x = 11 atm
Given : mole fraction of ozone = 0.17
Thus
Thus x = 1.87
Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios.
The expression for is written as:
Thus the pressure equilibrium constant for the equilibrium between nitrogen trioxide, oxygen, nitrogen dioxide and ozone at the final temperature of the mixture is 0.365