The red semicircle shown in the weather chart represents warm front.
Answer:
B They move because of the convection currents in the mantle.
The sigma bonds are formed when orbitals overlap side by side and is related to covalent bond In ethylene the number of sigma bond are 5.
Reason, carbon has four carbon -hydrogen bond which form four sigma bond. The other sigma bond is between carbon=carbon bond thus ethylene has 5 sigma bond
Answer: it would be 0.000674 km
Explanation: