The correct answer is letter a. distillation of a mixture. “Gasoline boils at a relatively low temperature (about 150°C). The kerosene is removed at around 200°C, followed by diesel oil at 300°C and fuel oil ataround 370°C," It is the process of DISTILLATION OF A MIXTURE.Here is the question.
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What topic is the teacher most likely talking about?
a. distillation of a mixture
b. filtration of a pure substance
c.evaporation of a mixture
d. sorting of a pure substance</span>
Answer:
1 mole FeCr2/ 1 mole FeCr2O4
Explanation:
We have to write down the equation of the reaction before we can answer the question;
2C(s) + FeCr2O4(s) -------> FeCr2(s) + 2CO2(g)
By inspection of this reaction equation, we can clearly see that the mole ratio of the reactants and products is 2:1:1:2.
Specifically, the ratio of chromites to ferrochrome is 1:1
Hence;
The mole ration required to convert chromites to ferrochrome is;
1 mole FeCr2/ 1 mole FeCr2O4
According to Bernoulli's Principle, slower moving fluids exert a lower or decreased pressure than faster moving liquids.
Answer:
B. Calcium nitrate
Explanation:
A soil will have an increase in pH if calcium nitrate is added to it. Calcium nitrate typically increases the alkalinity of soils when added to it.
Alkalinity is the degree of hydroxide ions concentration in the soil. This leads to increasing pH which tends towards the region of more bascity.
- When calcium nitrate is added to the soil, the plants uses an hydrogen ion to take up nitrate.
- Then an hydroxyl ion is excreted or released into the soil into the process.
- Nitrate based fertilizers do not acidify soils.
