To determine the mass of the sample in milligrams in this problem, we use the avogadro's number to convert from atoms to moles, relate the moles of element in the sample to the mole present and the molar mass of the sample. We do as follows:
1.552 x 10^22 atoms H ( 1 mol H / 6.022x10^23 atoms H ) ( 1 mol C2H4Cl2 / 4 mol H ) ( 98.96 g C2H4Cl2 / 1 mol C2H4Cl2 ) = 0.625 g C2H4Cl2 = 625 mg <span>C2H4Cl2</span>
1. all living things are composed of cells
2. cells are the basic building blocks of life
3. All cells are created by preexisting cells
Answer : The light rays are bent and refraction will occur - B.
As they contain, green pigement they can perform "Photosynthesis" and obtains energy from that process
Hope this helps!