The nutrition label shows the total amount of carbohydrates in grams. One gram of carbohydrates provides four calories of energy. For this food, the number of calories obtained from carbohydrates is _.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?

Element j is 1s 2s 2p 3s . (i) how many unpaired electrons does j have? (ii) is j a good oxidizing agent or a reducing agent? (iii) state reason for the answer.