Answer:
Explanation:
First write all numerators above the common denominator
4/5 - 1/2 - 1/2=
- 1/2
Subtract the numbers
- 1/2 =
- 
Write all numerators above the least common denominator 10
- =
Subtract the numbers and you got your answer :)
Answer: RbI (aq) and Zn(CN)2 precipitate
Explanation: zinc cyanide is insoluble in water.
With the advancement of science, electrons seemed to possess both particle and wave nature.
this is called the dual nature where electrons have both particle and wave properties.
earlier it was believed that electrons used to orbit around the nucleus in orbits.
Later it was found that electrons do not have fixed positions, the exact momentum and position of electrons cannot be determined at the same time
therefore the wave mechanical model was introduced which introduced orbitals.
Orbitals are spaces in which electrons are most likely to be found. These regions have the highest probability of an electron being found here.
correct answer is 3) an electron
Answer:
Obsidian is not a mineral as the atoms or molecules in obsidian do not have a crystalline structure.
Explanation:
Obsidian originates naturally and is formed by igneous rock.
When felsic larva comes out from the volcano,it rapidly cools down and thus form obsidian.It is pure black in color but some times color differ due to presence of some impurities.
It is brittle,but hard.It is not a mineral and is called as mineraloids and is not found in crystalline form,.
The main constituent is SiO2.
It is found in the margin of rhyolitic lava.
The psychoactive ingredient in alcoholic beverages is Ethanol (Ethyl Alcohol).
Distilled drinks or liquors and other alcoholic drinks/beverages are produced by distilling ethanol produced by means of fermenting grain, fruit, or vegetables. Unsweetened, distilled, alcoholic drinks among other alcoholic beverages contain ethyl alcohol or ethanol as the psychoactive ingredient.
