Answer:
Explanation:
Physical properties and physical change:
Physical properties are the properties of substance that do not involve the change in to another matter while the process through which change is happen is called physical change.
For example,
Melting point is physical property and the process "melting" is called physical change.
Freezing point is physical property and the process "freezing" is called physical change.
Chemical property and chemical change:
Chemical property is the ability of substance to change into another substance while the process through through which it is happen is called chemical change or chemical reaction.
For example:
The chemical property of iron is to react with oxygen and form rust. This process or chemical change is called corrosion. So corrosion is chemical change.
Hydrocarbon react with oxygen and form water and carbon dioxide. It is the chemical property. While the process is called combustion so combustion is a chemical change.
Answer:
Group 17, 2, 7, 7 electrons
Explanation:
Answer:
Following are the response to the given question:
Explanation:
The number of shells
n = 4
Calculating the spectral line:
Given which are missing in your question:
the flask is filled with 1.45 g of argon at 25 C°
So according to this formula (Partial pressure):
PV= nRT
first, we need n, and we can get by substitution by:
n = 1.45/mass weight of argon
= 1.45 / 39.948 = 0.0363 mol of Ar
we have R constant = 0.0821
and T in kelvin = 25 + 273 = 298
and V = 1 L
∴ P * 1 = 0.0363* 0.0821 * 298 = 0.888 atm
It's a question that scientists can test.
