Acentimeter an millimeter differ from each other by a factor of?

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

The identities of substances are the same before and after which type of change

What is the enthalpy of combustion (per mole) of c4h10 (g)? –2,657.5 kj/mol –5315.0 kj/mol –509.7 kj/mol –254.8 kj/mol