Answer:
hydrogen,helium, lithium,berallium,boron, carbon, nitrogen, oxygen,fleurine
B. The balloons rise at the same rate. Both balloons are the same size.
C. The warm balloon expands and rises. The cold balloon shrinks and sinks.
D. The cold balloon expands and rises. The warm balloon shrinks and sinks.
The correct answer is option C, that is, the warm balloon expands and rises, and the cold balloon shrinks and sinks.
It is known from the ideal gas equation, that PV = nRT
Here, P is pressure, V is volume, n is the number of atoms in gas, R is gas constant, and T is temperature.
From the equation, it is clear that the volume of balloon is directly proportional to the temperature. It signifies that at constant pressure when temperature elevates than at that time volume of the balloon will increase and when temperature reduces the volume of balloon will decrease.
Thus, the volume of warm balloon will increase because of which its density increases and it can rises easily as a less dense substance can easily rises in air in comparison to more dense gas or substance. Thus, the cold balloon shrinks and sinks.
The metal in the can expands due to the heat of the fire.
The particles in the can move more slowly until they join together.
Heat causes the gas particles in the can to move faster and farther apart.
Hello There!
Your Answer is that “heat causes the gas particles in the can to move faster and farther apart.”
An aerosol is a tiny liquid or solid particle that is suspended in the atmosphere.
Answer:
12.4 mol O2
Explanation:
4Al + 3O2 -----> 2Al2O3
from reaction 4 mol 3 mol
given 16.5 mol x mol
x = 16.5*3/4 =12.4 mol O2
Continental drifts was a theory that explained in how continent shift position on the earth surface.
The theory was presented in 1912 by Alfred Wegener, who was a geophysicist and meteorologists. The theory also explained the reason why plant and animal fossils that look similar are found all over the continents.
Wegener had the thought that all the different continents were at a point joined together before it breaks up and moves to their present position.
Wegener published a book in 1915 called "The Origin of Continents and Oceans. In this book, he further explained the theory of continental drifts but the theory was widely criticized by geologists because to them, wegener did not have a good model to properly explain how the continent drifted apart.
From Wegener explanation, there were certain things he laid emphasis on, which were very accurate, like the observation about fossils and rock. Wegener thought that the Continent might have plowed through the ocean crust just like icebreakers smashing through ice.
Although, Weneger continental drift theory was discarded but there are certain facts that he established. The theory brought the idea of moving continents to geoscience and after many decades, scientists confirms most of the things the theory covered. For example, the idea that the past existence of supercontinent joined all the landmass of the world as one.
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Your answer is C in the direction that relieves the change
That is the definition of Le chatelierts principle.
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