Calcium carbonate thermally decomposes to produce calcium oxide and carbon dioxide. After 90 seconds, the 10g of calcium carbonate has decreased to 8g.
What is the rate of reaction?

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

The climate of the continental united states is generally 1. tropical 2. temperate 3. arctic 4. highland

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm