(2) LiCl(s) (4) NH3(l)
The sample of matter that can be separated into different substances by physical means is NH₃(g), which represents gaseous ammonia. Therefore, option D is correct.
Physical means, such as changes in temperature or pressure, can cause NH3 gas to condense into a liquid state (NH₃(l)) or freeze into a solid state (NH₃(s)). These changes in physical state can be reversed, allowing the substance to be separated into its different forms without changing its chemical composition.
Gaseous ammonia consists of individual NH₃ molecules that are not strongly bonded to each other. This state can be separated into its individual molecules using physical means.
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Answer:
(1) LiCl(aq)
Explanation:
Question:
Which sample of matter can be separated into different substances by physical means?
1. LiCl(aq) ✔
2. LiCl(s) ❌
3. NH₃(g) ❌
4. NH₃(ℓ) ❌
Reason:
LiCl(a) is a mixture of a compound and water. The LiCl can be separated from the water. All the other choices are compounds.
Related Vocabulary:
- Aqueous: a water solution , indicated by the notion "(aq)". For example, HCl(aq) indicated a water solution of hydrochloric acid.
- Matter: Anything that has mass and takes up space.
a. True
b. False
(2) molecular structures
(3) ionization energies
(4) nuclear charges
Answer:
Due to molecular structures.
Explanation:
The different forms of phosphorus (white, black or red) are allotropes of phosphorus.
They differ in molecular structures.
White phosphorus: It has four phosphorus which form a tetrahedral shape.
Black phosphorus : It has orthorhombic structure and due to interlinked six membered rings, it is least reactive.
Red phosphorus: It is formed on heating white phosphorus. It is initially amorphus and turns crystalline on further heating.
We are given the amount of CaCO3 to decompose when heated. This will be our starting point.
98.60 g CaCO3 ( 1 mol CaCO3 / 100.09 grams CaCO3) (1 mol CaO / 1 mol CaCO3 ) ( 56.08 g O2 / 1 mol CaO) = 55.25 g CaO
0.9851mol. This is the rt answer just did it
b. sustainable grazing
c. underground mining
d. all of the above
Answer : Option A) Deforestation.
Explanation : Factors related to deforestation can lead to desertification in presence of natural drought.
As natural drought hit area is an area which has low amount of water supply in the land. It is also called as below average precipitation land when drought area is deforested it will lead to desertification. As the plants in the drought area are the reason why their is at least low water is found, if these vegetation is deforested then it will lose its capacity to hold water and the land will be deserted.
Answer:
The answers A
Explanation:
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