Answer:
Hello the answer is C: density
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Algebraic expression: It is an expression which is frame from the variables (x,y etc.), integer constants and algebraic operations (+,- , multiplication and division etc.).
Sequence is defined as the structured list of numbers.
Now, according to the given sequence, first place is , second is , third is , fourth is . Thus, place of the sequence should be determined.
The place of the sequence is . Therefore, option (A) is correct.
Answer:
2.408x10^23 molecules
Explanation:
Avogadro's hypothesis gives us a background understanding that 1mole of any substance contains 6.02x10^23 molecules.
From the above conclusion,
1mole of N205 contains 6.02x10^23 molecules.
Therefore, 0.4mole of N2O5 will contain = 0.4 x 6.02x10^23 = 2.408x10^23 molecules
Due to erosion, the soil is taken away from one place to another.This decreases the fertility of the land,.. it also is a cause for floods. Due to erosion, the vegetation is destroyed and nothing can be cultivated for a higher yield in the rough sandy land . Due to weathering of rocks, there is an advantage. The advantage is that the weathering of volcanic rocks give rise to Black Soil by which special crops like cotton,tobacco and sugarcane can be cultivated. Due to weathering, a hilly range may turn into a plain land after thousands of years.