A hydrate of formula M2EO3•xH2O (where M is a metal, E is a non-metal, and x is a whole number) has a formula mass of 252 g/mol. If the mass percent of oxygen in the hydrate is approximately 63%, what is the value of x? (Molar mass of oxygen = 16 g/mol). Enter your value as a whole number.

The number at the end of an isotope’s name is the number.

The polarity of an oxygen-hydrogen bond is higher than the polarity of a nitrogen-hydrogen bond, allowing amines to be more soluble than alcohols.

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.