Can someone help me figure this out? I'll give branleist if your right.​

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

Write a net ionic equation to show that hydrofluoric acid, behaves as an acid in water.

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.