The question is asking us to determine what gives the Amethyst its purplish color. Amethyst colors range from light to dark purple. The most highly regarded are the transparent deep purple colors. Amethyst ( chemical formula: Si O2 ) is the purple variety of the mineral Quartz.The pure Quartz is often colorless. Amethyst gets its purplish color because of the presence of Iron ( Fe ) and other impurities in the gem. Answer: C. Iron.<span /><span />
Answer:
Bonding in chemistry is known as chemical bonding which means the interaction or attraction between molecules.
Chemical bonds are of different type such as ionic, covalent, hydrogen, and metallic. Ionic bonds are formed by the transfer of valence electron from one atom to other and there is unequal distribution of electrons between two or more atoms. Ionic bonds forms two oppositely charges ions positively charged (loses electron) or negatively charged (gains electron).
Covalent bond are the strong chemical bonds that form due to equal sharing of electron pairs between atoms. They form a stable element and have stable attraction or repulsive forces.
Answer:
A, B and D
Explanation:
The rate determining step decides the overall rate of reaction and the species involved in the rate determining step determine the overall order of reaction. All the elementary steps in the mechanism sum up to give the overall reaction equation. However, transient intermediates only appear in elementary reaction equations and not the overall reaction equation.
Answer:
1. C
2. C
3. A
4. C
5. True
6. C
Explanation:
1. C The answer is conduction because the heat was transferred through direct contact.
2. C The answer convection because the heat was transferred through a medium (liquid/gas).
3. A The answer is conduction because the heat was transferred through direct contact.
4. C The answer is radiation because the heat was transferred through thermal emission.
5. True. This is because the air that is warmed rises, causing the cool air to replace it. You can picture it like the scenario in question 2.
6. C
Answer:
There are 6
Explanation:
The significant figures in that number are 5 4 0 0 4 7
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