Một mẫu natri iođua thô được phân tích bằng cách mô tả sau đây. I- + SO42- → I2 + H2S (không cân bằng)

a) Xác định số oxi hóa đối với S trong SO42-.

Which statement would indicate the presence of an acid

Use the drop-down menus to label each of the following changes p for physical change and c for chemical change. the substance changes to a new substance. the original substance can be recovered. the color changes. gas is produced and given off. the substance changes size, shape, or volume.

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.