Convert 38 kg 250g,53kg 350g into decimals and add

Convert in to moles: 20 g of water

Convert 36g of water into mole?

How many grams of H_(2)SO_(4) required to be dissolved in 250g of water to prepare decimolal solution?

Convert in to moles: 12 g of O_2 gas

Convert in to moles: 22 g of carbon dioxide

When a solution containing "W" g of urea in 1 kg of water is cooled to -372(@)C , 200g of ice is separated . If K_(f) for water is 1.86 K kg "mol"^(-1) . W is ___________