At room temperature, which of these are oxide minerals? select all that apply. a.h2ob. co2c. al2o3d. fe3o4

 C. and D.

Explanation: Oxide minerals are the minerals in which the oxide anion is bonded to the central metal atom. These are useful for industrial purposes.

Out of the given options, only two of them can be categorized as the oxide minerals.  

H2O and CO2 will not be considered as oxide minerals.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e