Scientis often need to define the system under study during an investigation. Explain why defining the system under study is important
Answers
Answer:
It is important because it separates the area that the process is happening from its surroundings, and it's easy to measure and make observations by doing that.
Explanation:
The system is the part of the universe that is separated for study. It has a frontier, which is the limitation of it, and the external area is the surroundings.
In the system the chemical and physical process is happening: reactions are taking place, gas is expanding, heat is being absorbed or lost, etc.
So, to understand the process that is happening, it's necessary to define the system under study because the measurements, analyze, and observation will be easily done.
Related Questions
What kind of cycle might you learn at school?
What type of energy powers a gas stove?
Give two examples of chemical energy being transformed into electrical energy
What are the properties of the reactants?
Answers
Removing the fuel will stop the fire, this is called a firebreak. Therefore, the fuel part of the fire triangle does firebreak.
What is the fire triangle?
The fire triangle can be described as a simple model for understanding the necessary ingredients for most fires. The triangle represents the three elements a fire requires to ignite: heat, fuel, and an oxidizing agent.
A fire naturally takes place when the elements are present and combined in the right mixture. A fire can be stopped or extinguished by removing any one of the elements in the fire triangle.
For example, covering the fire with a blanket blocks the supply of oxygen and can stop a fire. In large fires, decreasing the amount of oxygen is not an option because there is no effective way to make that happen in an extended area.
Fires in forests can be stopped by cutting down trees to make a gap known as a 'fire break'. Because cutting the trees can act as removing fuel.
Learn more about fire triangle, here:
#SPJ2
Answers
Answer : The mass of 12.3 moles of helium (He) is, 49.2 grams.
Solution : Given,
Moles of helium = 12.3 moles
Molar mass of helium = 4 g/mole
Formula used :
Therefore, the mass of 12.3 moles of helium (He) is, 49.2 grams.
Answer:
C. 49.2 g He
Explanation:
I got it right
made up of what?
Answers
Hot springs
c.
Dome Mountains
b.
Lava plateau
d.
Shield Mountains
Answers
The correct answer is (C) Lava plateau.
The explanation:
-Lava plateau is the landform form by volcanic activities , It's formed by highly fluid runny basaltic lava, within quit eruptions.
-It has a low viscosity so that it's a quiet eruption, which contains amount of trapped gases.
- It's flow and cover the original landscape forming lava plateau.
The answer is C. lava plateau
Answers
-Column 2:
-Transition Metal Columns:
-Columns 3–7:
-Column 8:
Answers
Answer:
Column 1. They have one valence electron
Column 2. They have 2 valence electrons
Transition metal column. Variable oxidation states
Column 3–7. Valence electron ranges from 3 to 7 electrons
Column 8. Completely filled i.e no valence electron
Explanation:
Final answer:
Each column of the periodic table represents elements with a specific number of valence electrons. Columns 1 and 2 have one and two valence electrons respectively, and are known for their reactivity. Transition metals typically have one or two, Columns 3-7 have 3 to 7, and Noble Gases in Column 8 have a full shell of eight, making them unreactive.
Explanation:
We can categorize columns, or groups, of the periodic table by the number of valence electrons, which are the outermost electrons in an atom that participate in chemical bonding.
- Column 1: These elements, also known as alkali metals, have a single valence electron in their outermost shell. These elements are highly reactive due to their tendency to lose this electron and achieve a stable configuration.
- Column 2: These are the alkaline earth metals, which have two valence electrons. They are less reactive than alkali metals but will still readily lose their valence electrons to achieve stability.
- Transition Metal Columns: These contain transition metals which typically have one or two valence electrons, although this can be more complex due to the filling of inner d orbitals.
- Columns 3–7: Elements in these groups have 3 to 7 valence electrons respectively. Many form covalent bonds by sharing their valence electrons with other atoms.
- Column 8: Known as the Noble Gases, these elements possess a stable full set of 8 valence electrons (except for Helium which has 2). They are very unreactive due to their stable electronic configuration.
Learn more about Valence Electrons here:
#SPJ3