What is the formula for Tetracarbon Decachloride?

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space