These are all group 4 elements, and for these elements, the metallic character increases as we go down the group. Therefore, the answer is:
Pb, Ge, Si, C
Divide the molar mass of the compound by the empirical formula mass. The result should be a whole number or very close to a whole number. Multiply all the subscripts in the empirical formula by the whole number found in step 2. The result is the molecular formular
21.9444....
To solve:
Distance / time!!
You can remember by a triangle...
/D\
| M T |
To find distance, MxT
To find mass, D/T
To find time, D/M
Mitosis- asexual reproduction
Quick
for reproductive purposes
Meiosis-sexual reproduction
Takes longer
For repairing