The easiest way to go about this would be to check out their physical properties. Physical properties are those attributes of a substance or material that can be observed or measured without altering or changing the composition of that material.
So we can check out the following physical properties:
1. Color. Check if there is any difference in color.
2. Weight. If possible, take similar sized pieces of the two and note any difference in weight .
3. Texture. Are they smooth or rough to the touch?
4. Smell or odor. Check out any unique smell.
5. Solubility. Dissolve a bit of each in water and see how soluble each is.
6. Melting point. Carefully heat a piece of it and see if they will melt, and if so at what temperature.
7. Pliability. Can any of them bend, are they flexible?
8. Magnetism. Can the be attracted by a magnet?
9. Bouyancy . Can they float on water?
10. Electrical conductivity. using a battery and small torch bulb, find out if they can conduct an electric current.
These 10 physical tests can help differentiate between the two materials. There are still many more that can be safely carried out.
To determine whether two solid substances are the same, measure their mass and volume, and perform additional tests if needed.
When trying to determine whether two solid substances are the same, there are several measurements and tests you can perform. Firstly, you can measure the mass of both substances using a balance. Secondly, you can measure the volume of both substances using a graduated cylinder or other measuring tools.
In addition to this, If the mass and volume are the same for both substances, it is likely they are the same. However, to confirm this, you can perform additional tests such as melting point determination or spectroscopy to analyze the chemical properties of the substances.
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Answer:
H = 1.98
S = 1.02
O = 4.08
Explanation:
Step 1: Find the Molar Mass of Adrenaline
Step 2: Find the Mass of Oxygen in 1 mol of Adrenaline
Step 3: Calculate Percentage Composition of Oxygen by Mass
Step 4: Calculate Mass of Oxygen in Sample
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B. total volume
C. amount of solvent
D. concentration
Answer
A) amount of solute
Explanation
Dilution is adding more solvent to a solution to decrease the concentration of solute in a solution. The amount of solute does not change although the concentration, amount of solvent and the total volume does change.
An example of this would be adding more water (solvent) to lemonade to decrease the concentration of lemon juice (solute). Obviously this would increase the total volume because you are adding more water to the solution.
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Answer:
lithium chloride
Explanation:
Li=Lithium
Cl=Chlorine
The correct name for LiCl is Lithium Chloride. It's an ionic compound composed of Lithium and Chloride ions, arranged in a lattice structure with Chloride ions contacting each other across diagonally on the face of a unit cell.
The correct name for LiCl is simply Lithium Chloride. This is an ionic compound, which means it is composed of two ions: the lithium ion (Li+) and the chloride ion (Cl-). In this case, Li (Lithium) loses an electron and becomes a cation (Li+), whereas Cl (Chlorine) gains that electron and becomes an anion (Cl-). The compound LiCl is then formed from the electrostatic attraction between these ions.
On the face of a LiCl unit cell, Chloride ions contact each other across the diagonal of the face, showing the close packing arrangement of the ions in the lattice structure of the compound.
It's worth noting that the common naming system for these types of compounds is quite straightforward. The name of the positive ion (the cation) comes first (Lithium), followed by the name of the negative ion (the anion) with an -ide suffix (Chloride).
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Every atom of the same
element has the same
atomic number.
Answer: True
Explanation: Every atom of the same element has the same atomic number of number of protons in its core. This is why chemists say that an atom is defined by its atomic number of the number of protons.
Unlike neutrons and electrons, you can't change protons. You can change the number of neutrons and it will still be the same element, but one is going to be a little bit heavier or a little bit lighter than another.
In addition, you can change electrons which creates
ions or charged atoms.
However, you can't change the protons.
For example, hydrogen has 1 proton in its nucleus no matter what and helium has 2 protons in its nucleus no matter what and so on.
The statement is true. Every atom of the same element has the same atomic number, which is the number of protons in an atom's nucleus. This is a unique value defining an element.
The statement 'Every atom of the same element has the same atomic number' is True. The atomic number of an element is unique to that element and determines its position on the Periodic Table. It represents the number of protons in an atom's nucleus and is the fundamental property that defines an element. All atoms of the same element will have the same number of protons, and therefore the same atomic number.
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