Find the molarity if 4.20g of NH4NO3 was dissolved in 90g of distilled water​

The modern periodic table has groups.

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

In the reaction between a crushed antacid tablet and vinegar what gas is emitted