How many moles does 205 g of helium, He, contain ?

What are the resulting coefficients when you balance the chemical equation for the combustion of ethane, c2h6? in this reaction, ethane is burned in the presence of oxygen (o2) to form carbon dioxide (co2) and water (h2o). (g)+(g)→(g)+(g)

When curium-242 is bombarded with an alpha particle, two products are formed, one of which is a nudge on. what is the other product

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder