Rift Valley Examples
- East African
- Rhine Rift Valley (Germany)
- Baikal Rift Valley (Russia)
Rift Valley Facts/Characteristics
- Bordered by fault zones and separating land masses
- A portion of land that drops, forming a valley.
- Formed as tectonic plates move.
Fossils - Examples
- Bones
- Shells
- Exoskeletons
- Stone imprints of animals.
Non Examples of Fossils
- Stones
- rocks
- Some bones (If they are fossils they will be a lot heavier than other bones.
Hope this helps.
i think it is 8. I might be wrong.
The combustion of an organic compound is mostly written as,
CaHbOc + O2 --> CO2 + H2O
where a, b, and c are supposed to be the subscripts of the elements C, H, and O in the compound. Determining the number of moles of C and H in the product which is the same as that in the compound,
(Carbon, C) : (561 mg) x (12/44) = 153 mg x (1 mmole/12 mg) = 12.75
(Hydrogen, H) : (306 mg) x (2/18) = 34 mg x (1 mmole/1 mg) = 34
Calculating for amount of O in the sample,
(oxygen, O) = 255 - 153 mg - 34 mg = 68 mg x (1mmole/16 mg) = 4.25
The empirical formula is therefore,
C(51/4)H34O17/4
C3H8O1
The molar mass of the empirical formula is 60. Therefore, the molecular formula of the compound is,
C9H24O3
