Can someone help me with the question in the image please

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

What is the importance of interlocking the fingers and rubbing while washing hands? the palms are the dirtiest parts of the hands. the spaces between the fingers get washed. the backs of the hands get washed. the fingernails are the dirtiest parts of the hands

The plant food contains nh4)3po4 what tests would you run to verify the presence of the nh4 ion and the po4 ion