<u>Answer:</u> The volume of concentrated hydrochloric acid required is 16.53 mL
<u>Explanation:</u>
To calculate the volume of concentrated solution, we use the equation:
![M_1V_1=M_2V_2](https://tex.z-dn.net/?f=M_1V_1%3DM_2V_2)
where,
are the molarity and volume of the concentrated solution
are the molarity and volume of diluted solution
We are given:
Conversion factor: 1 L = 1000 mL
![M_1=12.1M\\V_1=?mL\\M_2=0.2M\\V_2=1L=1000mL](https://tex.z-dn.net/?f=M_1%3D12.1M%5C%5CV_1%3D%3FmL%5C%5CM_2%3D0.2M%5C%5CV_2%3D1L%3D1000mL)
Putting values in above equation, we get:
![12.1\times V_1=0.2\times 1000\\\\V_1=16.53mL](https://tex.z-dn.net/?f=12.1%5Ctimes%20V_1%3D0.2%5Ctimes%201000%5C%5C%5C%5CV_1%3D16.53mL)
Hence, the volume of concentrated hydrochloric acid required is 16.53 mL
Weathering<span> breaks down and loosens the surface minerals of rock so they can be transported away by agents of erosion such as water, wind and ice. There are </span>two types<span> of </span>weathering<span>: </span>mechanical<span> and </span>chemical<span>. </span>Mechanical weathering<span> is the disintegration of rock into smaller and smaller fragments.</span>
A physical change.
Physical change = can be reverted + doesn't change substance
Chemical = changes substance
The answer is D they have 4 neutrons
That would be 3.621471•10^3