Amixture was found to contain 1.05g of sio2, 0.69g of cellulose, 1.82g of calcium carbonate. the percentage of calcium carbonate is in the is [x]%. note: round to the nearest percent.

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.