A, the atoms are rearranged
D: <span>Coronal Mass Ejections
e: Solar wind
f: </span><span>solar wind and magnetic field and Auroras
C1: single
C2: binary
C3: masses
C4: clusters
D1: </span><span>spectrum and color
D2: temperature
a: red
b: blue-white
3: </span><span>H-R diagram
4: main
a: </span><span>top and giants
b: </span>bottom and dwarfs
Answer:
![\large \boxed{1.81 \, \%}](https://tex.z-dn.net/?f=%5Clarge%20%5Cboxed%7B1.81%20%5C%2C%20%5C%25%7D)
Explanation:
![\text{Mass percent} = \dfrac{\text{mass of solute} }{\text{mass of solution}} \times 100 \, \%](https://tex.z-dn.net/?f=%5Ctext%7BMass%20percent%7D%20%3D%20%5Cdfrac%7B%5Ctext%7Bmass%20of%20solute%7D%20%7D%7B%5Ctext%7Bmass%20of%20solution%7D%7D%20%5Ctimes%20100%20%5C%2C%20%5C%25)
Data:
Mass of NaCl = 4.6 g
Mass of water = 250 g
Calculations:
Mass of solution = mass of NaCl + mass of water = 4.6 g + 250 g = 254.6 g.
![\text{\% m/m} = \dfrac{\text{4.6 g} }{\text{254.6 g}} \times 100 \, \% = \mathbf{1.81 \, \%}\\\\\text{The percent by mass of NaCl is $\large \boxed{\mathbf{1.81 \, \%}}$}](https://tex.z-dn.net/?f=%5Ctext%7B%5C%25%20m%2Fm%7D%20%3D%20%5Cdfrac%7B%5Ctext%7B4.6%20g%7D%20%7D%7B%5Ctext%7B254.6%20g%7D%7D%20%5Ctimes%20100%20%5C%2C%20%5C%25%20%3D%20%5Cmathbf%7B1.81%20%5C%2C%20%5C%25%7D%5C%5C%5C%5C%5Ctext%7BThe%20percent%20by%20mass%20of%20NaCl%20is%20%24%5Clarge%20%5Cboxed%7B%5Cmathbf%7B1.81%20%5C%2C%20%5C%25%7D%7D%24%7D)
Explanation:
the solid substance which left on the filter paper is called Residue