A mixture is said to be homogeneous if its composition is uniform throughout the mixture. They are referred to as solutions. On the other hand, heterogeneous mixture does not have uniform composition. The substances present in the mixture have visible difference or phases.
Sea water is composed of salt, sand and water. Here, salt and water form homogeneous mixture but due to the presence of sand, the mixture is heterogeneous. Salt dissolves in water and the solution has uniform composition but sand does not dissolve in water, even after vigorous mixing, after some time it settles at the bottom resulting formation of layers. Thus, sea water containing salt, water and sand is a heterogeneous mixture.
If you know the Table of elements you can see it on.
We are given with the initial volume of the substance and the molarity. The first thing that needs to be done is to multiply the equation in order to obtain the number of moles such as shown below.
number of moles = (40 mL) x (1 L / 1000 mL) x (0.3433 moles / L)
number of moles = 0.013732 moles
To get the value of the molarity of the diluted solution, we divide the number of moles by the total volume.
molarity = (0.013732 moles) / (750 mL / 1000 mL/L) = 0.0183 M
Similarly, we can solve for the molarity by using the equation,
M₁V₁ = M₂V₂
Substituting the known values in the equation,
(0.3433 M)(40 mL) = M₂(750 mL)
M₂ = 0.0183 M
Answer:
1.138158E24 atoms or 1.14 x 10^24 atoms
Explanation:
To find atoms/particles from moles you just want to convert using avogadro's number which is 6.022 x 10^23
1.89 mol x 6.022 • 10^23
———— = 1.138158E24 atoms
1 mol
so 1.138158E24 atoms or 1.14 x 10^24 for scientific notation
hope this helps :)
The physical science unit of criminal investigation applies principles and techniques of chemistry, physics, and geology to the identification and comparison of crime scene evidence.
<h3>What is forensics in criminal investigation?</h3>
Forensics science is any of several fields of study involving the collection of physical evidence and its subsequent analysis.
The aim is to use of science and technology in the investigation and establishment of facts or evidence in a court of law.
There are several units involved in forensics science such as the following;
- Biology unit
- Physical science unit
The physical unit of forensics is the unit that applies principles & techniques on chemistry, physics and geology, which are physical science fields, to identify and compare crime scene evidence.
Learn more about forensics at: brainly.com/question/14403044
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