In the reaction 2ca + o2 → 2cao for every 2 ca you will need how much o2? a. 1 c. 3 b. 2 d. 4

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?

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm

Aman applies a force of 500n to push a truck 100m down the street how much does he do?