Can someone help me figure out what the Lewis structure for NCl2−?

You have 125g of a certain seasoning and are told that it contains 76.0 g of salt what is the percentage of salt by mass in this seasoning

You open a can of soda at room temperature and hear a hiss. which of the following factors has changed inside the container? a.) atmospheric pressure b.) temperature of gas c.) type of gas d.) amount of gas

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.