Ten grams of mercury(II) oxide react to produce 9.3 g of mercury and
oxygen. What is the mass of the oxygen produced?

A. 0.7 g

B. 19.3 g

C. 7.0 g

D. 1.7 g

Leave an explanation, thank you :)

An exothermic reaction is conducted in an insulated calorimeter filled with water. the calorimeter is then sealed so that there is no heat exchanged between the contents of the container and the surrounding air. which of the following statements is true about the reaction?

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

How do you know when a chemical reaction has occurred