Sand doesn't directly cause weathering because sand is made via weathering. When rocks get weathered they become sand. But maybe when the sand and wind work together they might be able to weather some rocks
Answer:
Yes , covalency fails to explain the formation of BeCl₂ and PCl₅.
Explanation:
covalent bonds are formed between two atoms by sharing of outermost electrons in order to attain octet for attaining stability . To octet means to attain 8 electrons in their outermost orbit .
BeCl₂ :
Be has two electrons in its outermost orbit and each of Cl has 7 electrons .
Each of Cl shares one electron each with each of two electrons of Be . Cl atoms attain 8 electrons as octet . But Be attains only 4 electrons ( 2 of Be and 2 from Cl atoms ) . Hence octet of Be is not attained . So covalency fails in the formation of BeCl₂ .
PCl₅ :
P has 5 electrons in the outermost orbit . Each of these electrons shares with one electron from each of Cl atoms . Thus Cl attains octel state ( 8 electrons ) but P attains 10 electrons ( 5 + 5 ) , 5 of P and 5 from 5 Cl atoms .
Hence Octet of P is not attained . Hence covalency fails in the formation of PCl₅ .
The correct answer from the given choices is A. One gram of table sugar is equal to 1.76 x 10^21 molecules of sucrose. Scientific notation is a method that scientists use to easily handle numbers that are very large or very small.
Answer:
The new temperature is 527.15 ºC.
Explanation:
<u>Charles’s law</u><u> states that the volume of a fixed amount of gas maintained at constant pressure is directly proportional to the absolute temperature of the gas</u> (the absolute temperature is the Kelvin temperature).
We need to calculate the temperature after the expansion, that is T₂. For that, we use Charles' law:
Because we have to use the absolute temperature, we convert ºC to K adding 273.15:
<u>T₁</u> = 127 ºC + 273.15 ºC = <u>400.15 K</u>
T₂ = 800.3 K
We substract 273.15 to the result to convert it back to ºC:
T₂ = 800.3 - 273.15 = 527.15 ºC.
